Figo, you should post this kind of a question in the Linux forum where it will get more attention and more responses.
Gameguru, dependin the amount of free space you have on your existing HDD, you may not be able to install Mandrake. A 5 GB partition is the absolute minimum I would try to load Mandrake on.
And by the way, since MS designed FAT/ FAT32/NTFS... no Linux flavor is going to work on that partition. You will need a tool like Partition Magic to free up some space on the HDD so that Mandrake can load on it.