Hey Bizzare.
There are several things we need to know, to troubleshoot.
i.e. if ur system is booting or you are getting the 'Insert the disk.....'.
Or if u r getting read error while opening a s/w, file or like that.
Make sure if MBR is okay. Try some Auto-Recovery s/w to backup (Restore 2000 is fine, try this at following link) then delete all the
partition and format ur hdd again.
http://www.bitmart.net/download.shtml