Sprite sheet tutorial?

[SMBComix]

I'm wondering if anyone out there knows an efficient way to create large sprite sheets, or if there's a program that does it for you (preferably not browser-based). I decided to create my own Fallout sprite sheets for use in sprite comics, but I'm having trouble getting the sheets actually put together -- doing it manually is incredibly time-consuming and tedious, and the one program I've tried (Sprite Sheet Packer, it's called) doesn't seem to want to do large sheets.

[puggsoy]

You can try Hoeloe's program here. I've never used it myself but I think it does what you want.

If not, then you might have to do it by hand. If you know how you would want it to be automated then I could maybe make a program specifically for this though, if it isn't too hard.

[SMBComix]

Unfortunately Hoeloe's program doesn't support .gif format. It does look promising, though!

[Dazz]