Northen Wolf
Young Hunter
It's really really easy to make pics transparent...
How to do it in gimp. I use same thing, un-fortunally I cannot make convert image size down so my *gif files are 8 kb instead of 4 kb

Here you do it in photoshop. - I do not use this program, so I don't know how well this site teaches you to use it.
Just Google: "How to make pictures transparent using XZYX". Replace XZYX with your photo editing program. AFAIK MS Paint cannot do transparent images.