I'm loving the Wikipedia PHP Script, and solving my all my install problems except one. I'm not quite sure how to edit the tinyblog user_rights field so that I can become a sysop of my own site! Does anyone have a php script or an SQL query to do it?

If you're using the Phase III software (the stuff in the "newcodebase" directory, then just use this SQL query:

UPDATE user SET user_rights='sysop,developer' WHERE user_id=X;

(where X is your user id, which you can determine with s SELECT query). In the Phase II software, replace "sysop" and "developer" with "is_sysop" and "is_developer". If you only want one or the other, omit the comma.

Also, this might not be the place, but I've noticed how cool the wikipedia.com's mod_rewrite is, but I don't know how to use it? Is there a simple setup text file on how to use mod_rewrite with Wikipedia?

In general, using "mod_rewrite" and "simple" in the same sentence is a non-sequitur. The full documentation is on Apache's site. The incantation used at wikipedia.org is this:

RewriteEngine On RewriteRule ^/wiki/(.*)$ /w/wiki.phtml?title=$1 [NE] RewriteRule ^/w/wiki.phtml(.*) /w/wiki.phtml$1 RewriteRule ^/wiki$ /w/wiki.phtml RewriteRule ^/$ /w/wiki.phtml RewriteRule ^/wiki.phtml/(.*)$ /w/wiki.phtml/$1 [NE] RewriteRule ^/wiki.phtml$ /w/wiki.phtml

This is with the software installed in the "/w" directory (I don't like installing stuff in the document root--it's too inflexible for later changes. But those last two lines make it look as if it's installed at root). If you install the scripts in a different directory, or want different URLs, modify the above appropriately.