I installed the Windows RC on a Toshiba Satelitte A305 yesterday. You will have to do a clean installation. If you dont have a Toshiba recovery disk, I'd suggest ordering one just in case of emergency.
The only issue I had was after windows went thru the install... it hung on "setup preparing desktop for first use" for about 45 min... not good. I fixed it by going into BIOS and changing the SATA controller from ACHI mode to Compatibility Mode. I reinstalled the RC and everything worked great,
it might also ask for a "Toshiba Firmware Linkage Driver". I had this issue and it turned out that it is a password utility that Toshiba must use. (havent had any issues by not installing it) I havent seen any performance issues.
The video chipset, wireless network, and built in webcam works just fine. Aero works. A side note: you will have to go to www.support.toshiba.com
and download the camera utility for your model and install it in vista compatibility mode. Worked for me. Camera works great.
Windows RC rocks on this toshiba :-) Boots up in 65 secs... no BSOD(yet lol), sleep/hibernate work... and no probs with it not booting
ps: installed RC on a Dell Laptop and a custom build desktop and both work great!!