XML to XML transformation using XSLT

I want to transform one XML to another XML using XSLT. Need urgent help.

Input : One XML
Output: Another XML in to changed form
using XSLT.

You didn't mention what language you are using to facilitate this. Assuming you are using PHP you can find examples to do just that in the PHP manual

http://www.php.net/manual/en/function.xslt-process.php