I know exactly what you are talking about... I have tried to fix this problem with other video cards and there is no easy fix to this =(
I have tested a few of them so far and here is my experience.
ATI all in wonder - covers entire screen w/ overscan.
Trident 9685 PCI Video card w/ tv-out (trident chipset?)- Good overscan but cut's off the taskbar.
MSI-6215 (intel 815E): also cut's off the border where the taskbar is.
Shuttle FV-24 w/ tv-out (chrontel chipset): Cut's off at the top only.
[ 10-12-2001: Message edited by: moahdib ]