I occasionally try to make mods, but I don't have any design skills, so I can never figure out what to make...
I used to find a lot of glaring billboards at codenamegta*, but after playing San Andreas, I came here and noticed some more billboards. If I find a proper way to make them look more 'outdoor', I'll try making a Photoshop guide.
Sec, creating a quick example
(Hmm, mappers aren't Vista-compatible, this may take a little longer)