I didn't want to partition, and still don't. Am using Wubi:
http://www.softpedia.com/get/System/...isk/Wubi.shtml
Put the Wubi download and the iso for Ubuntu or Kubuntu or Xubuntu in the same folder. Run Wubi. The Linux is installed as a Windows application. When/if you don't want it, just go into Add/Remove Programs and "poof" it's all gone. This is how I got rid of Kubuntu after testing, and Ubuntu once when I messed it up so badly I could no longer get it to boot.
When you boot (or Restart) the default will be Windows; you'll have about 10 or 15 seconds to hit the down arrow key to select Ubuntu (or K. or X.) to boot it instead. I can see no disadvantage to this way except that you can't do the more complicated partitioning--separate partition for swap file, for data, etc.
Gimp (included in Ubuntu) is the free open source alternative to Photoshop. I played with it a little and it looks extremely powerful; too complicated for this beginner.
I mentioned my unhappiness with Xubuntu on my old laptop--128 meg memory and 400 Mhz CPU. On my todo list is to try Puppy Linux, Damn Small Linux, Gentoo and/or Slackware.