Well u havent made any reference to whether ur running 32 bit or 64 bit windows 7. If the later, then i would suggest u find another model close to yours with 64 bit drivers
. I know that in my series of vaio, the hardware is similar in all vaio fw. Thats why the drivers installed successfully...
if u do find the the drivers, which im sure u will, then remember to extract the installers from the packages using Universal Extractor. Doing this bypasses the check to see if the drivers are for the right model (since they wont be).
Hope things work out!! Pm me if u need any help
To answer ur question, u can only use 64 bit programs only if ur running the 64 bit version of Windows 7, otherwise no u cant. It is mainly an architecture difference in how the CPU handles data...thats all i know lol.