Main page
...er, RTFM, IIRC.
I think it should point to the Web Main Page thingie, though. We created a static HTML file (for a "pretty" entry point) and left it in $TWIKIROOT as index.html, though you might try a symlink or a redirect to the appropriate top level file. Trying to remember if the docs cover this or not.
Read the directions for "Enabling Authentication of Users". Have you added "AllowOverride All" to the appropriate Directory section? I think I had to walk through this a couple of times, but I got it working as expected.
