Doubt in Copying file and .htacess Rewriting

Question

Now this is an example of a search on my website :

http://engine.searchr.us/web-search.phtml?search=TEST+SEARCH

Now,The first thing what i want to do is rewrite all the searches which are being done into something like this : (using .htacess)

http://engine.searchr.us/web-search/search/TEST-SEARCH.html

And the second thing is i want to add a PHP code in this page such that when this search is done ie. when http://engine.searchr.us/web-search/search/TEST-SEARCH.html is loaded it automatically copies the the current search "TEST-SEARCH.html" as a file and saves it in http://engine.searchr.us/SAVED-SEARCHES/TEST-SEARCH.html

So how do I do that ?

Thanking You, 5416339