Having easy to crawl url's can help a lot, below method for linux servers, for windows servers try "Helicon Tech" isapi it does accept the same code below making it nice and easy for mod rewrite
Convert this url
http://pcaccessoriesparts.com/agora/agora.cgi?cart_id=&product=Antec-PC-Cases
Into this
http://pcaccessoriesparts.com/agora/Antec-PC-Cases.html
htaccess file of mine is placed inside the agora cart folder where the agora.cgi resides
.htaccess
RewriteEngine On
RewriteRule ^([^/]*)\.html$ /agora/agora.cgi?cart_id=&product=$1 [L]
Or if you have problems i have a script on my site to take out all the hassles for mod rewite
Mod RewriteTool - Online Computer Sales

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Computer System - PC Workstations - Online Computer Sales