Just to follow up on this, the code extensions didn't work. They do extend the code duration but only by fractions of a second. If I try to put a code with any more that 100(hex) pairs then Wizzit 9 9and other porgrams for that matter) say that it is an invalid IR code. I gues I just need to wait until Marantz adds the 'Duration' function to the Wizzit software like Philips have with the latest version of PPNG. Thanks again for all you halp guys and if anyone can come up with a discrete 'On' code for a Panasonic TX32 PL1 I'd be very grateful. I have tried pretty much every code I can find on here and none of them work when used within a macro.