That's basically what our G.P.S. part of the wiresplice (or some of the delimiter boxes - Posh's box springs to mind, oo-er! - UK joke... nearly!!) does anyway!
Having the PGM "think" you are in 3rd when you are in 4th, 5th, and 6th is a good thing for performance if you don't use an HRC delimiter. (It may make the bike feel a little "different" in 1st and 2nd if the G.P.S. is permanently wired to 3rd.)
Andy.
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