Simple really. Go to
http://www.acme.com/licensemaker/ This is a website with a program that has all the states. Type in your preferred text and it gives up a graphic that you can copy/paste into your preferred graphics mod program. Licenses for SE's are 8mm wide and 4mm high (approximately). I'll post pictures of my 2005 Ford GT (modified with a license plate, 3/4 tint - electrical tape) and replica numbers - on hood, back deck/fender and doors) as soon as I get around to taking a picture of it. My Daughter also has a Mach 1 with her own customized license plate.
(edit) when ready, print to a white label and trim then put on your car (sorry, too-fingers!)
CGChief