What Warpy said...
If you take the time to search for my posts on this forum you'll find where I explained a lot about signature making.
There are many tutorials online to learn Photoshop/GIMP with. As far as I know GIMP doesn't look like photoshop at first but can be made to look and operate exactly the same.
It is well worth learning. Just take your time and do some tutorials then get some ideas and put what you've learned to use. The biggest and most important thing is to save your work as you go and EXPERIMENT. I've been using PS for years now and still only use about 20% of the whole thing.
$900 Photoshop or FREE GIMP. You choose.
No OpenGL on Vista... just one more reason not to "upgrade" to Vista.
...YES... I'm back. Been back in WoW for a week now.
...NO... I'm not doing signatures anymore. No spare time for it.