.htaccess mod_rewrite rules

[phpnstuff]

I googled alot of examples and can't get additional strings to work

RewriteEngine On
RewriteCond %{HTTP_HOST} ^server\.com
RewriteRule (.*) http://www.server.com/$1 [R=301,L]
RewriteRule (.*)/$ url.php?loc=$1
Options +FollowSymLinks

so if you go to server.com/file/ work fine, but I want to add additional &strings and can't get them to work.

I would like to add other options:
url.php?loc=$1&unit=$2 (as) server.com/file:unit/

My second question, say my second tier isn't always "unit" say its "set" do I have to add another rewrite line for that claus? server.com/file:set/

Any help would be much appreciated...

[tfk11]

The QSA flag may be what you're looking for.

http://rewrite.drbacchus.com/rewritewiki/Flags_2fQSA

[ebar]

tfk11: i get a page error when trying to load that link...

[tfk11]

Works for me... if you can't get it to work try this one.

http://lmgtfy.com/?q=mod_rewrite+qsa+flag