Hello,
If you boot using the CD when you start the installation a partitioning tool should come up during the process. I would create a partition of around 16GB for the installation of Ubuntu and the rest for Swap space.
Xlphos
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If you have already shrunk your windows partition, just choose "install into free space" and it will automatically make a swap and a / partition of you of the size it sees fit.
jbennet
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