Hi sausagejohnson,
I couldn't say for sure, but this is my gut-instinct:
The RPM may not install at all -- the problem being not so much dependencies, but the fact that Mandrake and Fedora often install programs to different locations. You may the dependency installed, but the Fedora RPM can't find it.
Even if you got it installed, you're likely to find problems associated with using a different config tool to your systems default tools. Each distribution is set up differently, and Fedora may not correctly access or modify Mandrake's config files. In fact, the result could be a dangerous system compromise if any of the drak tools become confused and spit the dummy.
I could be wrong, as I've never tried it. But the recommendation would have to be to stick to the default MDK tools -- they're pretty good IMO.
OT: Interesting what you say that about the Fedora tools. I thought about looking at Fedore Core 2 Test 2, but I was uncertain as to whether I'd get the same sort of desktop trimmings (like a mature package manager, config tools, etc.) as I'm used to with Mandrake. Might have to take another look at Fedore when the final release is out.
Cheers,
Tim