Well, if you upload the file somewhere and link to it, I can have a look at what can be restored. If you're using the 1.0.x versions of the ReplayMod, the answer is almost certainly "nothing", with 2.0.x your chances are better. If your file is less than one MB in size, you can consider it lost.
Also, Minecraft doesn't usually crash because of massive replays (unless you're out of disk space, then it might actually), so the crash report would be useful for fixing that crash in future versions (if it's a problem with the ReplayMod).