I had problems with it crashing when I replayed the second mission as soon as I fired the Bee Gun, no clue why. Unfortunately I'm not too certain how much luck anyone will have in fixing the issues. The edit was amazingly simple to get the powers in, unfortunately any graphical effects will hit the wall of needing to edit the preloaded resources.
I tried to get something similar to the video posted by gibbed with pretty stars, but the closest I could get not knowing how to change preload was some of the genki effects. These trails that did not loop and created very short lived projectiles. I played with some others, the VTOL blast is one of the best for energy projections, but a bit too large for my taste.
Someone with more persistence than I could probably edit an option into the UI that could toggle the state of the Super Powers variable, but on the plus side it seems to reset it self between saves so it has no residual effects after uninstalling.