Thanks a bunch Nemesis!
My plan now is to install new drive, load XP and then install the old IDE. And just to be absolutely 100% sure... I don't have to worry about master vs slave jumpers since I have no other IDE devices (I made sure to spend the 5 bucks extra for an SATA burner). The assembly is tomorrow when the final pieces get here from Newegg. In case you wanted ot know here is my expected setup.
Antec P180B Case ($40 rebate!)
Intel Core2 e6600 (nice price drop)
Asus p5b deluxe with wifi (expensive but running ethernet cables is a drag)
2GB Patriot Memory ($50 rebate!)
Foxconn Nvidia 8800GTS 320mb ($15 rebate! Based on the reviewer websites the 640mb version wasn't worth the extra 100 bucks for 1-2% increased performance)
500GB Samsung HD (Really cheap and won a reliability survey on Newegg) + 200GB WD IDE drive (4 years old and still going strong)
Viewsonic VX922 19" LCD ($40 rebate! Great reviews)
XP Pro (cause Vista is way too rough and choked with DRM right now)
That's about it for important parts.