Can not install MS Project Professional 2007

I am running Vista Business on a Sony Vaio with 100 GB hard drive and 2GB of
RAM. I have tried to load the "New" 2007 version of Project Professional.
When it get almost done it says that I don't have enough memory and will not
let me go on. Once I make sure everything else is closed and there is enough
memory, it says the files are corrupt and stopsme at that point. I try to
uninstall it and that does not happen. Trying to change, does no good either.

Help.