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index.php?lan=en&set=456 to /en/456/index.html but now you have problem with your inside links so i suggest this format:
index.php?lan=en&set=456 to index_en_456.html this is what i use and believe me the crawling is much easier...!
Andreas
Yes mod_rewrite it just changes your url to an easy understand format. It's a really useful module for server side pages.
It is just this misconception that I tried to address with my previous post. When used to mask query strings mod_rewrite [httpd.apache.org] will just be used in the second step, i.e. rewriting the maked URI back to the URI with query string. The first step, i.e. masking the query string is you applicationīs job.
BTW there is a great introduction to mod_rewrite available at WebmasterWorld:
An Introduction to Redirecting URLs on an Apache Server [webmasterworld.com]
HTH Andreas