With regards to a work arround on the dial up connection, I guess you can download the rpms to your hard drive through a download manager program to your hard drive then install from there.
You will need a list of rpms to copy first. You can try here:
http://www.mandrakesoft.com/security...ories?dis=10.0 for Mandrake 10 updates. Then try going to
http://rpm.phone.net and search for the rpms there.
Be sure to check the md5sum after downloading and run a --sig (or something like that) to check the signature of the rpm before installing them.
This should make installing updates a little bearable as you can pause the download and resume when you feel like it. The downside is that this is a rather long wait especially if you are going to copy an update with 10 rpms with filesizes ranging from 60kb to 40MB. But is still better than letting urpmi to copy them from the internet. At the moment this is the only way I can think of to make installing updates using a dial up connection bearable.