Yes you can. Use XP mode (http://www.microsoft.com/windows/vir.../download.aspx) as described in the option 3 of the wiki (http://wiki.maemo.org/Updating_the_tablet_firmware). (I use this method under W7 64-bit Ultimate and works fine)

Actually option 1 of the said wiki might be a better method, though I haven't tried it (have xp-mode installed already):

"Disabling signed driver detection is done by choosing the option "Boot without checking for signed drivers" (or something similar) in the boot-menu. To display the boot-menu press the "F8" key as soon as the windows boot process starts. The rest of the process is similar to XP. "