Hi - Actually I do have a "One for All 6" URC and whilst I could not find any code that would work for a Liteon, it was easily programmed, and I can control most of the main features of the Liteon from it.
I had to program virtually every button which took a few minutes and a bit of patience. I can use the guide menu and the timer menu, select channnels etc.
The main problem with the One for all 6 is that it is limited to about 25 programmed buttons, and so I did not have enough to program the numbers 0-9 in, but actually you rarely use these - even when entering timed recordings (you use the cursor up/down and select to set the times mostly).
The other minor issue is that you then have no or very few programmable buttons left for other operating modes (e.g. VCR etc) but this was not a significant issue for me as the device codes for my other equipment worked quite well.
There is a more expensive "all for one" model (kameleon) which I think has more extensive programming functionality, but I could not be certain if it would work as well as the "all for one 6" model has for me.
The only time I need to use the original remote is when I need to adjust the system settings, clock timer etc.