[newbie] Boot Trouble

[DuBose8]

Hello

I installed another flavor of Linux, and now cannot get back into Mandrake. 
I've booting into from floppy, but the partition table has changed. I need to 
tell it at the boot prompt that the boot part is at hda5 instead of hda6 now, 
how can I do this if its possible?

Thanks
Scott