Don't be to afraid of a 64bit OS ...

On my Win7 64 i got a lot of apps, games whatever installed - just about everything runs fine in the 64bit OS - running everything before on Vista 64 since january 2007, too (upgraded my running Vista with Win7).

If something didn't work no more, than it was mainly old,old programs, that i've never used anymore since years, just noticed it by testing different stuff.