Okay I know this problem was my fault for not allocating enough space for my root partition but I don't have time for a re-format... So my root partition has about 380mb left, which is enough for yum or apt to download all the packages it needs for updating Fedora Core 4. Unfortunatly when the packages are done downloading I'm left with about 20mb which is not enough for the installation. So, is it possible to tell yum or apt to download the packages onto a different partition then update the system on the root partition?

Modify /etc/yum.conf
The cachedir line is the path to where yum stores its files.

You can also run 'yum clean' to clean up the existing cache.

-Cloak