how to upload .psd files

I want to upload my prints and i am scanning them through photoshop cs2, but i dont believe this site supports that file format, how do i make it so that i can upload my prints.

Save it as a jpeg using the save as feature.

Exactly what huskie said.

Now its too big to fit, and i cant get it any smaller than 120 kb.

Resize the image, say to maximum of 800 on long side (or less), use "save for web" and use some pretty heavy compression... I usually make my longest side 500 pixels... so I don't have to use as much compression. Or use third party site to host your higher quality pictures... and imbed the pictures in your post. (read, not just a link, I hate only links)

Resize the image to 800pixels (click Image, then Image Size). Then click File, Save As. Once you've selected the filename it pops up with a window with a quality selector. The filesize is in the bottom of this window. Adjust the quality slider until the filsize falls under 100kb.