HELP..

Hello, soo i ran into a small problem and im not sure how i did nor how to remedy the situation. Everything was running smooth, and i was getting ready to download Tankentai SSB 3.4e when i figured id run RPG XP. I made another game to test the side battle script, only i went to run my previous project and it told me" Failed to load actor data" everything was running fine lol and now it's messed up.. Also, when i wen't to run the DEMO for the SBS it told me "RGSS202E.dll could not be found" im still learning the basics of coding lol.. any help would be greatly appreciated thanks!
and if i posted in the wrong section my apologies
-edit- Also looking for a side view battle script similar to tankentai SBS, however i've searched and most of the DL links are dead. If anyone knows a good one please post thanks in advance!
~Frost