Sadly I'm not Vista savvy, but I might be able to offer some advice.
I run Windows XP with an intel pentium processor that can handle Vista upgrades, but I heard some CFS3 incompatibility issues with Vista so I stuck with my XP version. When it comes to AVH planes, you have to start over with a new, unmodded CFS3, what some call here the Vanilla installation, because of its purity.Then once CFS3 is installed, go to Microsofts' site and get the 3.0 patch installed first, then the 3.1a patch installed shortly after so that there are no compatibility issues with the sim and your hard drive. Then you can add on the Fxtextures, effects, pylons, weapons etc. and put them in their proper places. Please make sure when doing these particular installations, bear in mind that the zipp folders must be opened and the stock files have to be overriden.
For example: If i were to install the Wepak folder, download it to a temp folder on your desktop, then unzipp it from the temp folder, go to the top tab and click edit and select all (much easier instead of clicking one file at a time!) Then click copy then drag your mouse to the CFS3 weapons folder and right click paste, and yes if you are overriding any files. There are two files here at AVH called Preload and Effects. Place these two in your main CFS3 folder and override the two stock files. All of the 1% planes require pylons and weapons in order to fly or else the sim will crash on you. Make sure you dont rush to place all of the planes in all at once , take it step by step.
Afterward, the BDP nuker is used to delete all of the BDP files in the sim so that when you start over again the game with meticulously register all new addons and files so you can play and see all your new weapons and tanks.
Overall, it takes me 2-3 hours to get the sim just like I want it. That's why I stick with stock CFS3. ETO and PTO seem nice, but things happen in life and when your computer goes, it takes everything with it, so I stick with what I know.
Any questions don't hesitate to post in your thread.