Question : URL Rewrite for ASP website for better search engine optimization

We are planning to use URL rewrite for our site for better search engine optimization. The site is in classic ASP. This website running on multiple servers using load balancing server. I searched on internet and found Helicon ISAPI/Rewrite/ Component to rewrite URLs. Suggest me any other good alternatives.

I have other problem for doing this.
We use sessionid in our all URLs on the website like
http://www.mywesite.com/dept.asp?sessid=GE2SR04F1032008&depid=100&catid=251

Suppose depid 100 is Electronics and catid 251 is Digital Camera then what is the best way to rewrite above URL.
In short we want to Optimization URL like

http://www.mywesite.com/ Electronics/ Digital_Camera.html

How can we include sessid in the Rewrite URL?
Is a sessid in the URL effect the search engine optimization?

Answer : URL Rewrite for ASP website for better search engine optimization

Well I am a linux guy, but when in the asp world we use several methods to emulate the Apache module "mod_rewrite"

Since your asking this question I think a good solution might be something like ISAPI_Rewrite. This is meant for exactly what you are doing and very configurable. depending on your set up you may have to write some fun little regular expressions ;-) but for the most part it should be pretty straight forward.

http://www.isapirewrite.com/