What you want can be done completely automatically and optimally

You will do less downloading than a CD.
I am doing this already, I am also on a limited connection.
On one of your machines that is most on, install
urpmi-proxy.
Get only the cauldron boot.iso, dump it to USB-stick, boot, and during first questions there is a question about where to install from; specify your urpmi-proxy machine.
Then you get the most recent installer, and most recent packages, while only downloading packages you need.
And next time you install urpmi-proxy will fetch them from disk if no newer version exist - if it exist it will fetch it.
Of course if you have more than one mga1 machine, set them to use urpmi-proxy too, so you save bandwidth there too.
(Actually, best to do this first so you see urpmi-proxy is working OK.)
At home & work Mandriva since 2006, Mageia 2011. Thinkpad T40, T43, T60, T400, T510, Dell M4400, M6300, Acer Aspire 7. Workstation using LVM, LUKS, VirtualBox, BOINC