sounds like you may have an Dual Boot system there Bryan, hmmm, if it is the NTLDR then it definatly sounds like a NT4, 2K or XP system file has been deleted although your stating that the OS is 98, this is a confusing one, if it a 98 machine, reboot with the boot disc in, once at the command prompt type the following

SYS C:
this will copy your system files from your 98 boot disc to the hard drive. BUT, make sure that you are definatly running windows 98 or else it could be a long reinstall.good luck.