Powerless is the best person to answer this.
However, I am running SuSe 8.1 on the same disk as XP home. SuSe installed itself onto a partition it created - I just accepted all the default options - and created a boot menu giving me the options of SuSe or XP on boot.
On my other machine I used Partition Magic 8 and created a specific area for SuSe because I had a much smaller HDD.
They both work fine!
Try a Google search for "Linux", There are loads of sites.