I'm making a map called 'farm', it's just a modern day farm. Anyway, when I munge it after i munges all the bumpshader etc and gets to my files it stops, then I munge again and it says 'cannot process because file is being used elsewhere' or something like that. I need help

you might have had the file open when you munged check all your tabs and close all of them except for munge then try again

If the munge appears to stop, leave it be. I've never known VM to simply freeze, so more than likely it's just working through whatever files it has reached. It can take a few minutes to munge, depending on what you're munging.

StormtrooperCommander wrote:'cannot process because file is being used elsewhere'

VisualMunge uses a bunch of little tools to help it do its work. When you kill VM like that, some of its tools may be still running. When you remunge, it can't use the already running tool. If you don't want to wait, you have to kill the process of the running tool before remunging.