Hi,
"Clear Documents" in Taskbar and Start Menu properties is the quick way,
though that also clears several other areas.
To selectively delete them, click start/run and type regedit, expand the
plus signs to reach:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TypedURLs
Then click on the values in the right pane representing the lines you
wish to remove and delete them.