Usually you can copy files around with Active Sync and your desktop computer by browsing to the appropriate folders. On your phone, though it comes with a program called "File Explorer" it doesn't work as well as Total Commander, a program for your phone you can download. However, I couldn't get it to copy the Tapres.192.dll file to the \Windows folder on the phone, I had to get a copy of Resco Explorer to do it.
http://www.ghisler.com/pocketpc.htm - Total Comander website
http://www.resco.net/pocketpc/explorer/ - Resco Explorer website