Try doing a `df' at the shell prompt. If you have ``/'' or ``/usr'' showing up as 100% used, chances are your partition was too small for the entire install. Unfortunately, this does not result in any type of error messages unless you are watching closely (which most people don't when the thing tells you it is going to take 2 hours to install :-). You will most likely need to reinstall and do one of two things: a) make your root or ``/usr'' partition larger or b) install fewer packages.
Also, if none of the partitions you made for Linux is full, you are probably just missing some packages. You will need to use glint or rpm to install those.