OK, forgive me for being confused when you backpedal your statement like that, but seriously, I use MultiMC and don't give two shits about the FTB Launcher usually(unless it's a slick pack like the sort that JadedCat or Eymaz make, or a pack that meshes well with my style like TPPI), so is there a generic way to do this that could apply to MultiMC? Because while it's cool and all that the FTB Launcher has this functionality, it doesn't do most people a lot of favors, even on the FTB Forums.
At top of this page, click Main Site. Then Servers. Then Server Download. Then Download Server under the Monster image. You now have the server zip file. Unzip it into a folder you can find later. Go to folder in explorer or whatever you use. Click ServerStart.bat. Nowhere in there does that use the FTB launcher.