Wiki access is not just for programmers. If you only want to contribute once, just FM Presets, we'll still give you write access if you try.
Contributing in this forum thread instead of trying to put it on the wiki is kinda silly. You're basically limiting who can see your presets to just the people who use these boards, and that doesn't help nearly as many people as having them on the main Rockbox site in the long term.
If you're having problems with the wiki, simply ask for help in the same place you asked for write access, there's almost certainly someone who can help you around.