Were you using LILO or GRUB to dual boot in the old system or NTLDR?
If LILO-Have you tried telling LILO where your Linux partition is?
Sorry i've never used GRUB but I think it works the same.
This example tells LILO that the bootable partition is on the second partition-(2) of the second-(b) IDE hard drive.
Are you sure it says /dev/hb2?
I think what Tinkster is asking here is - Is that a typo? "/dev/hb2" is it actually /dev/hd