Blackhawk, nobody cares how many questions you have. That's what this community is for.
Check your AGP slot. Generally the 8x cards will fit a 2/4x slot. The issue is the voltage, but incompatible cards will not fit the slot. So if it fits, you should be fine. Don't get too hung up with the 8x vs 4x thing. There is not a tremendous difference in speed, all other things being equal.