Did you try & run the file (Open Sign) I posted above with the (
.txt) file extension?
I doubt Mach3 can handle the (
.crv) extension.
You might try the tutorials like Joe suggested. The link below is for the "Open Sign" tutorial (PDF). Scroll all the way down to #10 (bottom of the page) on how to save a file so it can be used outside of Vcarve.
http://www.vectric.com/vcarve-downlo..._Open_Sign.pdf
.