I doubt that you will be able to download to a TSU7000/7500 remote but I could be mistaken. I cannot recall if XP compatibility mode worked for USB drivers or if there was some special setup required.

You might get lucky with the 3000/3500 as they don't have a special driver.

This indeed has been discussed in the past. As it does appear you have some time, you might want to search for vista 64 or Windows 7 64 and read about others' experiences.