Since you need to be able to test the explosions, here is a test installer for version 0.72b1. (SVN revision 1410)
For a working set of test files for the custom explosions, get http://user.supradigital.org/jcnossen/c ... osions.sdz, which can go directly in your taspring directory. It modifies the armrl, armbull, armllt and armhlt in a very ugly way

It contains the current lobby, so teamcolors will be messed up.
NOiZE also reported blue explosions, which don't happen for me. It would be really great if someone finds a way to overcome that somehow...
For multiplayer tests, I propose you use the test server at compstomp.de
Finally, the ground flashes don't work well when they are big, I know. I plan on making the ground flashes more flexible, probably like I did for the projectiles. Customizable ground flash textures and blending operations are also on my todo, as they probably don't take a lot of time either.