While it is a great technique in FS9 to hide aircraft elements like tanks and rockets by applying an alpha channel, this leads to strange side effects in FSX. If you don't like these side effects you can use the patches ("Alpha Patch" in the lists below). They correct this problem by making all elements visible.
A whole lotta thanks to Dan for making the screen shots and to the various authors for allowing me to make the fixes available.

Eurofighter Typhoon:
MAIW German Eurofighters.............................--> Owl's Nest Download Center, on FlightSim soon after repackaging
MAIW Italian Eurofighters...............................--> Owl's Nest Download Center, on FlightSim soon after repackaging
MAIW RAF Coningsby Eurofighters.....................--> Owl's Nest Download Center, on FlightSim soon after repackaging
MAIW Spanish Eurofighters.............................--> Owl's Nest Download Center, on FlightSim soon after repackaging
MAIW Austrian Zeltweg Eurofighters...................--> in packaging, then on FlightSim & Owl's Nest Download Center
Dassault Mirage 2000:
MAIW Part1 2000C Dijon-Longvic........................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part2 2000C Cambrai-Epinoy.....................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part3 2000B Orange-Caritat......................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part3 2000C Orange-Caritat......................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part4 2000D Nancy-Ochey........................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part5 2000N Luxeuil-St. Sauveur................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part6 2000N Istres-Le Tube......................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part7 2000BD Mont-de-Marsan..................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part7 2000BDN Cazaux............................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part7 2000C Cazaux...............................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part7 2000C Djibouti-Ambouli....................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part7 2000C Mont-de-Marsan....................--> in packaging, then on FlightSim & Owl's Nest Download Center
MAIW Part7 2000D Djibouti-Ambouli....................--> in packaging, then on FlightSim & Owl's Nest Download Center
Taiwanese AF - 499th Tactical Fighter Wing...........--> planned
Peruvian Air Force...........................................--> planned
Panavia Tornado:
RAF - Coningsby AFB 121st.....................................--> Owl's Nest Download Center, on FlightSim soon after repackaging
RAF - Tornado F3................................................--> Owl's Nest Download Center, on FlightSim soon after repackaging
RAF - Tornado GR4..............................................--> Owl's Nest Download Center, on FlightSim soon after repackaging
Royal Saudi AF - Tornados......................................--> Owl's Nest Download Center, on FlightSim soon after repackaging
German Armed Forces GAFFTC.................................--> Owl's Nest Download Center, on FlightSim soon after repackaging
Italian Air Force Tornado........................................--> Owl's Nest Download Center, on FlightSim soon after repackaging
Ray Parker's special GAF paints................................--> on FlightSim and the Owl's Nest Download Center
Ray Parker's RAF F3 TG ZE735.................................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's German Navy MFG1..........................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's German Navy MFG2..........................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's German Navy MFG2 43+87..................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's Italian 36 Stormo.............................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's Italian 50 Stormo.............................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's Italian 6 Stormo...............................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Bruggen 1990............................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Cottesmore 1990.........................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Cottesmore 1990 Alpha Patch...........--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Leuchars 1990............................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Leuchars 1990 Alpha Patch..............--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Honington 1990...........................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Honington TWCU 1990....................--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Laarbruch 1990............................--> on FlightSim and the Owl's Nest Download Center
Daryl Payne's RAF Coningsby 1990...............................--> on FlightSim and the Owl's Nest Download Center
Daryl Payne's RAF Coningsby 1990 Alpha Patch................--> on FlightSim and the Owl's Nest Download Center
Daryl Payne's RAF Coningsby 75th Anniv.......................--> on FlightSim and the Owl's Nest Download Center
Daryl Payne's RAF Coningsby 75th Anniv. Alpha Patch........--> on FlightSim and the Owl's Nest Download Center
Chris A. Brown's RAF Honington SQN 13......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Chris A. Brown's RAF Marham SQN 27......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Chris A. Brown's RAF Marham SQN 617......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Chris A. Brown's GAF ETNJ JBG38......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Chris A. Brown's GAF ETNN JBG31......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Chris A. Brown's GAF ETSB JBG33......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Chris A. Brown's GAF ETSL JBG32......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Chris A. Brown's IDS Royal Saudi AF......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Mark Heimer's GAF Holloman......................--> in packaging, then on FlightSim & Owl's Nest Download Center
Ray Parker's ADV RAF SQN 56......................--> in packaging, then on FlightSim & Owl's Nest Download Center