Unfortunately, you bought the wrong pocket pc! You can take a look at the following project:
http://synce.sourceforge.net/synce/index.php
You will not be able to install apps on your pocket, but Synce allows you to browse, delete and add files on your pocket, uninstall apps and sync with Evolution for mail, calendar and contacts.
The installation is a little bit tricky so read carefully the directions on the web site.
Also, I heard about some project to install a Linux OS on Ipaq PocketPC, but I don't know the status of these projects. Google for Linux on IPAQ...
Good luck!