I made a new GUI for carcass based on the info in this thread.
In my program just click "on compile human model" browse for your .xsi and it'll generate a .car file for you and start the compile process. The output messages from carcass will be displayed in a window in the GUI.
There is also a dump GLM/GLA option.
note:
The program has to be in the same directory as carcass.exe
http://jedidreams.codealliance.ca/do.../carhelper.zip