Hello I think you have found your answers.
Custom scripts do not work in multi player right now, so having different timers might be difficult. In the global.lua file, there is section for the multiplayer stuff. How to use it I am not sure, but I could find out probably.
Baked lighting in Multi player is broken.
Different winzones. Hmm. I believe that multi player as it is in Bld 1121 only uses a kill count based win situation. The answer may be found out, when I find out if we can modify the MP script and where they might be stored. Been a while since I looked at it.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.