Help I hosed my boot loader Fedora Core will not boot.

[Caleb Rodriguez]

I was messing around and tried to installyet another distro (Mandrake 
9.2) i did the defaults. I already had xp dual booted with Fedora Core 1 
working perfectly. I decided to experiment and install another distro 
since I could not get Xandros to install.  Anyway here is the story. I 
went to install Mandrake 9.2 and all seemed to go well. When I rebooted 
grub only gave me the options for mandrake and windoze. I booted into 
windoze to remove the mandrake partitions and cleared my restore.
My system only boots in the other OS and I want to go back and be able 
to boot from either one. The partitions for Fedora Core 1 are still 
intact. I just need to know what to do besides reinstall. I do not wish 
to lose any of my data.

Help please..
Thanks