No, you can't double up the p codes. If you want to engrave literal text, you use P0. So G47 P0 .... (MFG : 100###) will engrave exactly that. If you want the 1000### to increment, you could use P1 (#######), and set the initial value in #599 (or #10599 on the new control). That would have to be a second G47 line. All you need to do is figure out the X value you want the second line of engraving to start at.Hope that helps!