video driver update causes display to revert to 4 color

hi nuhi! i am not sure if this is nLite related ... i don't integrate any driver but just leave the driver part as is ... i use HFSLIP to integrate HFs & nLite to remove regular components in WinXP Pro SP2 ... if i recall it correctly i already posted this finding before in this forum as well as HFSLIP ... i've never really paid much attention to this as i just shrugged it of ... however when i try to update latest video drivers for either ATI (Catalyst) or nVidia (ForceWare), my screen resolution always degenerate to either 4 or 2 color (i'm sorry but i cannot exactly remember if it was 4 or 2-color) ... the only resolution i found was either i do driver rollback or unistall the driver update ... since then i just didn't apply any update but from time to time i still try to see if i would be successful in these attempts ... some friends likewise experience the same video problem ... my apologies in advance if this has nothing to do with nLite to begin with ... your feedback would be greatly appreciated ... thanks!