Toshiba Satellite A135-2246 change OS from Vista Basic to XP-Pro

I have read many posts about changing from Vista to XP-Pro on different

Toshiba laptops, however I've tried most suggestions to no avail. I'm

looking to see if anyone can point me in the right direction so I can get

back the use of my USB flashdrive? Most of the drivers came back once I

went to Driver Detective but I still have several that unidentified. I've

been to Tohiba's website and downloaded an earlier version for the USB

driverer and it will not install on my system. The items not working

properly is 1) power management settings to let the computer

hibernate or sleep 2) USB connection to see a flashdrive 3) the good clear

display settings.

Any help would be appreciated....Thanks

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deb