Just a reminder -- entries for The Sub Report's Submarine Christmas Photoshop Contest are due by 2359 tonight (Thursday the 14th). Here's the page with the entries that have come in so far. It's a great chance to have some fun and maybe win a prize.
You don't need any fancy software to do a good photoshop; I just use the Microsoft Picture It! that came with my computer, and if you don't have that, Eric has a link to some freeware. For example, I just put together this admittedly lame "Christmas Tree on the RPCP" entry in about five minutes:
For good results, you might want to spend a little more time than I did. It's fun for the whole family!