I know it's been a while since this thread has been active and my input is not quite relevant because the remote control discussed in this thread is an RF one (I think)
But I have just had a great deal of trouble getting the IR commands from the Mertik G6R-H (IR) remote to work with the Pronto TSU9600 so I thought I would paste the hex codes here for anyone who has similar trouble in the future..

For the record, Prontoedit Pro didn't learn the commands correctly and I ended up using an RTI IR Learner Kit to do it and copied the hex codes from the RTI software over to PEP

ON: 0000 0068 0000 000D 0010 0010 0021 0010 0021 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0010 0021 0010 0021 0240

OFF: 0000 0068 0000 000D 0010 0010 0021 0010 0021 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0010 0021 0010 0021 0010 0021 0240

FLAME UP: 0000 0068 0000 000D 0010 0010 0021 0010 0021 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0010 0021 0010 0021 0240

FLAME DOWN: 0000 0068 0000 000D 0010 0010 0021 0010 0021 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0021 0010 0010 0021 0010 0021 0021 0010 0010 0021 0240

I've tested these and they work perfectly.

ENJOY! :)