Josiah, thanks very much!
The website I linked to has a template you download. You can either print it out and hand-draw your characters in the appropriate boxes, then scan it back into your computer to upload it to their site. Or, you can just do everything digitally. My printer/scanner is out of ink, so I had to do it all digitally. And... I don't have a tablet, so I decided to use simple straight lines that could easily be drawn with a mouse and the Pen tool. So, yep... it's all just done with the Pen tool, each one on a different layer, and then merged into a single layer after I was all done (to upload it to the website).
Actually, when I have more time, what I could do for the next one (as a work-around to not having any printer ink) is to hand-draw them on a piece of paper, scan them in, clean them up PaintShop Pro, and turn them into transparent PNGs. Then just size them down to place on the template.
EDIT: Here's a screenshot of them on the template. (The template is much larger than what I'm showing here). I guess it only picks up on the "black" so you don't need to fill in all of them.
Alien Language Font by Neyjour (template).PNG