Need someone to help me clone

Hi. I am a complete newbie to graphics in general. I am trying to put a yearbook shirt on a person that isn't wearing a yearbook shirt (you'll see what I mean below). I got one picture done, but cannot for the life of me get the others to work. I am adding the pictures below in the hopes that someone can help me out by doing the shirt by Friday. I will be eternally greatful if you can help.

(BTW, the person without the yearbook shirt...is me, and I look like a dummy, so the advisor said if I could put a shirt on myself, it's OK with her, so if someone could help me out, it'd be like a personal favor)

Thanks,
Kevin

http://thecacklers.com/yearbook/1.jpg
http://thecacklers.com/yearbook/2.jpg
http://thecacklers.com/yearbook/3.jpg

hi kevin,
i made selections with the polygonal lasso tool then adjust the images with the "brightness and contrast" hope this helps.

Wow..thanks....really really thanks..you've helped me more than you can ever imagine.

Kevin