hmm, it seems to me that cmos isnt detecting your boot partition. when your computer if first starting up, press del of f2 or whatever to get into cmos config, go throught the menus until you find your ide configuration. check if its detecting your hard disk. if not, its most likely a master/slave conflict.
uhhh, its hard to explain how to fix if you dont know much about computers...
unhook all your ide devices, cdrom, dvd, hard disks, etc. on your mother board, find the primary ide connecter and connect it to your hard disk with the boot partition. make sure that the hard disk is set to master, which it shold since i hope you didnt move any of the pins. now try to start your computer up. if it doesnt work, its too much trouble to explain, go someplace to get it fixed, shouldnt cost much.
if it does work, plug your other ide devices back in, one by one, and see if it works. if not, try to figure out where the problem is. remember, only one master and one slave on each channel.