Both Extruders At Once For Replicator

This is a program for converting gcode files to run both extruders at once to print two things at a time, even using different filament diameters. The executable is for Windows machines, but c source is also provided. It is partially based on "Dual Extrude Both Extruders at Once for Replicator" http://www.thingiverse.com/thing:23792