authentication - Asp classic retrieve querystring after rewrite -

i decided make asp classic user sessionid store url querystring

1. cookies not save enought , needs enabled in users browsers
2. sessions in asp classic not recommended use when site have more 100 users, asp append new sessionid on each request , aspsessionids growing in cookies on each request

so after user login generate serverside sid , put url url like

http://www.example.com/?lang=en&sid=00c04fb1625d

and can variables script using request.querystring("sid")

but need make human readable url format , want rewrite http://www.example.com/?lang=en&sid=00c04fb1625d http://www.example.com/en/00c04fb1625d/

so question is:

1. how rewrite url in asp classic in (10.000) pages?
2. how retrieve rewrited values url?