They can ALWAYS be hacked, but at least 50% of the time the hack produces horrendous checkerboard artifacts.
You can always uninstall the hack however, so the card will still work if the hack does not.
The 9800 SE PRO (256 bit mem interface) can be hacked to the 9800, the 9800 SE non-pro (128 bit memory interface) can be hacked to something like the 9500 PRO.
------------------
Radeon 9500 (modded to PRO w/8 pixel pipelines)
AMD AthlonXP 2000+
3dMark03: 3529