I checked out Google for avatar resizing programs, but they all seem to produce a square image, which is not what I want. I need it 150 pixels wide (vertical height will work out at about 30)

I will try the compression thing, thanks.

I use the Panasonic Photofun Studio for editing, which is probably laughably elementary, but it was what came with the camera.

Hopefully I can get it to do what I want.