Many people experience crashing problems in XP with the ‘usbradio.sys’ file. This driver for ‘Radio21’ is provided by Gemtek (who appear to have taken over the DRU-R100) and is specified for 98, ME, 2000 and XP.
The uninstall leaves residue, so make sure C:\windows\system32\drivers\usbradio.sys is replaced by the new installation. You’ll have to enable viewing of system files to verify of course. The self extracting files will create a folder named 'JIDAS' if you want to view them.