Thanks Tweakie. I am going to restart my computer and Mach3 to see if that helps with the G20 part.   If anyone had a screenshot of exactly how the file was edited and where the G20 was placed, that would be wonderful! I tried the scorpion gcode and it plunged my spindle into my sacrifice board and broke the bit! So i would advise newbies like me to be aware of this. I am going to try the other files shortly and keep my fingers crossed.

Ooops !

I have now reduced the Z plunge depth and feed-rate of the Scorpion file - hope that works better for you.

Tweakie.

Tweakie, it's good that you resized it. But I bet we all have had a broken bit or two at the beginning. I reinstalled Mach3 and set inches as my units. I got the roadrunner file to work properly by typing G20 G40 G90 as the very first line.
 However, I cannot get the file that I made and you downloaded and looked at to carve at inches instead of mm.
 It was made in inches using Solidcam.
 I tried putting G20 G40 G90 at the beginning of the file, but it didn't change.
 Any suggestions?

Threads are starting to overlap here - please refer to your other post http://www.machsupport.com/forum/index.php/topic,35867.msg245540.html#msg245540

Tweakie.