Virtual dir not working with Apache re-direct

[programguru]

I ran some tests, but I am trying to find out a final the RIGHT answer to my issue. Still have hope..

My below Apache rewrite seems to only work on domain names that are resolving, but not on: http://myserver/~username/ .. does anyone know a work-around for this? anyone seen this before? (RHEL4)

##########################

Options +FollowSymlinks
RewriteEngine on

RewriteRule ^index.html$ index.php
RewriteRule ^page1.html$ page1.php
RewriteRule ^page2-(.*)-(.*).html$ page2.php?catid=$2
RewriteRule ^page3-(.*)-(.*).html$ page3.php?catid=$2
RewriteRule ^page4.html$ page4.php
RewriteRule ^page5.html$ page5.php
RewriteRule ^page4b-(.*)-(.*).html$ page4.php?catid=$2
RewriteRule ^page5b-(.*)-(.*).html$ page5.php?catid=$2
RewriteRule ^(.*).html$ index.php?catid=$1

##########################

[programguru]

does anyone know if there is an advanced Apache forum I should post this in? don't seem to be getting any responses?