How hide some values from rewrited querystring

I'm rewriting urls of an old classic ASP site with very complex querystrings. I haven't got time for change them. 

I have urls like to:

http://www.site.com/zoom.asp?idProduct=23203&CodProduct=45637&Img=57964&IDS=18&IDMa=241&CodF=981&NFileP=Artli.asp&ric2=stringSearch&page=1&crcm=StringBrand&crcf=StringCategory&DsSt=Category Description&DsMc=SubCategory Description&Desproduct=Product Description

I'd like to rewrite it but showing the most significant values only (e.g. idProduct, CodProduct, DesProduct) and hiding the others, like this:

http://www.site.com/23203/45637/Product Description

How can I do that?

Thanks