> I had 98 and XP installed on separate partitions of my HDD. recently I formatted
> the partition with 98 on it and reinstalled 98. Now the dual boot option would
> no longer come up, even though XP is still installed on the other partition. How
> do I get the dual boot option back?

When you install Windows '98 it replaces the bootloader in the MBR with it's own, thus the NT bootloader (which offers the dual boot option) is no longer loading. Using the fixmbr command in the recovery console (boot the XP CD and select recovery console) should restore the NT bootloader.