Not sure if this works for vista... (Vista Blows) but here is a command to clear your internet history. I have to run this at work because our GPolicy won't let us do it the old skool way

RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 4351

Just tested it on Vista , works like a charm . Thanks

Echo Off
Echo Clear IE7 Browsing History From the XP or Vista

ECHO CLEARING Temporary Internet Files
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 8

ECHO CLEARING Cookies
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 2

ECHO CLEARING History
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 1


ECHO CLEARING Form Data
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 16


ECHO CLEARING Passwords
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 32

ECHO Delete All
RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 255

REM Delete All - "Also delete files and settings stored by add-ons"
REM RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 4351