Yeah, ok. I'm pretty sure that it's not that easy, although it would be very nice if it was
But, you aren't thinking of patching the whole of Mandrake??? That would be an enormous amount of work!
Mandrake is not like Debian, where you'll always have an perfectly updated system just by doing some apt-getting.
If you want to upgrade an app in Mandrake - i.e. if you want to upgrade an app in Mdk 9.1 by just downloading and installing the newer app version in Mdk 9.2 - then it will often not work since you'll end up in this infamous "dependency hell" amongst the rpms. Of course you could compile the app from source, but then I guess you'd have the same problem.
The kernel should be upgradeable, in a sense. See
this. Hm, or rather
this
BTW, I hope I didn't sound too grumpy in my previous posts