No matter how many times I tell people why bother to delete or backup they dont listen.

The easiest way to get media mall back would be open up medianet browser. On the home page scroll down to Tone, Games, Apps. That will take you to the web version of Media Mall. You can get the Media Mall 2.0 download for free from there. I will include down bottom the jad and jar if you want to install with TKFE. You can install applications with TKFE in the locked games folder also.
Did you check here for apps that use aim?
http://www.samsung-impression.org/third-party-samsung-impression-software/applications-for-the-samsung-impression/Also getjar has a few but not sure how great they are.