to adjust the ps2rate in nt try this ftp://ftp.cdrom.com/pub/bluesnews/misc/Ps2rateNT.zip and set the rate for 200
or if you want a registry tweak then try this http://www.regedit.com/cgi-bin/detail?id=81
hope that helps...
there is a ps2rate for nt, not really sure
for usb though, but found this 2 days ago at blues news download page...
okay heres the link and try it ftp://ftp.cdrom.com/pub/bluesnews/misc/Ps2rateNT.zip
enjoy