is an excellent facility that help's you set up your "urpmi sources".
Urpmi is the facility for updating and installing/removing software. Urpmi is actually a command line facility, but it can also be used with the mandrake control centre (configure my computer in mandrake 10) you'd then follow the software manager facility, which inturn opens up the window to run the graphical remove, install, update and media manager app's.
Your distro, show's Slackware 10, well if you want to use Urpmi, I think you'll find that you'll have to install the mandrake.
You'd then follow the link (at the start of this post), and put in the distro version that you've installed (which easy urpmi currently default's to mandrake 10 official). Then check the button's for the sources that you want to use (I use everything), and you use the drop downs to select mandrake mirror's that are close to your physical location (for speed etc), you'd then hit the button to go to section 3, and you then need to highlight and copy the info that's output.
Then open a terminal, su to your root account, input the root password, then once in, you just paste the output that you copied from the easy urpmi site. You may have to hit enter, some system's just start.
That download's the sources/software list(s) and you can then think about going back into the mandrake control centres software manager, I usually do updates first.
If you do this, make sure you select sources for everything i.e. contrib, main, updates, plf and jpackage, then when you look at the graphic rpmdrake+ facility, you may see very similar entries, where only the version numbers are different - the "plf" source often has more upto date versions than the actual mandrake sources. I just always select the very latest ones.
hope this helps some?
p.s. If you do "go this way", then checking the version numbers of the software can be important because occassionally it can cause conflicts (I had one recently where the version of whatever it was, already more up to date than what was being offered by the update facility - I just didn't bother to apply the update, but if you got such a problem, you'd probably have to uninstall/remove the packages that are causing the conflict in the first place).