Mod Rewrite expert, I need help

I want to set a website where user can get theirname.mydomain.com. Lets say my domain is domain.com and I already activated wild card setting into the httpd.conf config. What I want: 1. When abc.domain.com accessed, the server will process domain.com/index.php?user=abc 2. When abc.domain.com/product_1_rose.html accessed, the server will process domain.com/index.php?user=abc&prodid=1&prodname=rose (note abc, 1 and rose are the any number and words depending on user type in browser) I tried the following config: ------------------------------------------------------------------------------------------ RewriteCond %{HTTP_HOST} ^((?!www\.)[^.]+)\.domain\.com$ RewriteCond %{REQUEST_URI} !^/index\.php$ [NC] RewriteRule ^(.*)$ /index.php?user=%1 RewriteRule ^productid_([0-9]+)_([0-9a-z-]).html$ /index.php?prodid=$1&prodname=$2&user=%1 ------------------------------------------------------------------------------------------ But, it doesnt work. When opening abc.domain.com/product_1_rose.html, it will open the abc.domain.com default page. If I removed rule: RewriteRule ^(.*)$ /index.php?user=%1, the rule for abc.domain.com/product_1_rose.html works well, BUT abc.domain.com failed to load into the browser. So, How can make both of these rule work? Anybody have the idea? I'm willing to send some $ by paypal if the code works ;p Thank you very much.