Toad...jpgs won't get you to the final product. Depending on that .jpg's resolution it can be a starting point, meaning it's an electronic file. Hopefully it's a high-res .jpg. But we need to get it converted into vector art to get them into a simple .eps file format then to the vendors .gxp file format. I know...whoa...here comes the electronic graphic designer geek talk. Stand back!
I'm "assuming" these are scanned .jpgs of artwork that you drew by hand?
I can help. Or if you want...just call up a sign-shop to request stickers, see what they think of your files. They may want to start over on the scan to get a better resolution and then to do the different file format steps. Might charge ya though? :shrug:
Either/or...let me know.
Hhahahhaa! Man I miss your guys' stories and trials and tribulations on the water. Always a good laugh!