@MrPhil...you are exactly right...even though my CP said it was PHP5, I had to go into the PHP settings and explicitly set it to PHP5, and then I got past that error. I got it hooked up to the database, and am now getting a 500 Internal Server error when I try to save the settings. That one looks to be an issue with the mod_rewrite settings...I have an email to support in on that one because I don't believe I have access to the file that needs edited (httpd). Thanks for the info.
@durangod...Thanks for your two cents.

Luckily, I'm only approaching this from a hobbyist perspective right now. My ultimate goal is to run an art site with social networking elements to it, but for right now I'm just playing around to see if Elgg could be a tool to use. Having unsupported mods could definitely be an issue, but I'm a programmer and am probably more interested in seeing if I can mod it myself anyway, so to that end, it may work for me. The issues you had are definitely something I'm going to keep in mind though, as I make the decision on just how much tweaking I have the patience for.
