I apologize if I put this in the wrong place of the forums, but this spot seemed the most fitting.
So basically, I installed the MoonQuest+ modpack. It runs fine. The only issue is the modpack does not include optifine lite for minecraft 1.6.4 (the minecraft version this modpack is running on.) I decided I would grab a .jar download to place into the mods folder of the modpack. There is no META-INF folder in there, just so you know. When I started the modpack, it will bring me to the "Mojang" loading screen and then just close down and bring me straight back to the laucher. I checked the folders inside the modpack and there was a crash report that is below. I have no clue why this is doing this, as I seem to have done everything correctly. I am also running on linux (lubuntu). Please help and if there is any more information I forgot/need to provide then please let me know. Thank you for your time.
Crash report is below, sorry if I posted it wrong, as I am new to these forums and I'm not too sure as to whether or not there's a more proper way to post crash reports.
[Edit] I forgot to mention the crash report is when I was installing the optifine HD version, instead of the lite. Both times I tried installed either of them the game crashed.
http://paste.ubuntu.com/25882400/