Welcome to Pocket PC Addict piru550 and congratuations on your Cingular 8125 purchase! You can find all the downloads you need in our downloads section
here. To install games and apps on your device you just need to download the setup file on your PC and run the installation program (make sure you have ActiveSync installed on the said PC before you connect your 8125 to it). If you are downloading a .CAB file, copy it directly to your device using ActiveSync, open up File Explorer on your 8125 navigate to where you placed the file and run it from there. That should install the program for you.
-Tim