How to hack NEC1 protocol?

[clinkme]

I've a box (hdd player Enigma), where a long press of the FFWD and REW buttons is
treated as rewind and fast forward, and a short press is treated as NEXT and PREV files. It is very terrible, so I begin to search and have found here a hacked NEC2 protocol with similar functionality written by Rob.
But I need help to make similar changes to NEC1 protocol for Kamleon URC-8040

Thanks in advance,
Il
P.S.
The signal (short keypress), received by my UIR, is like that: 00 FF OBC ^OBC.
Device number is 0. The second bytes of cmd/dev are complemented.
Unfortunatelly, my UIR cannot distinguish short and long keypresses...
P.P.S.
What is the difference between NEC1, NEC2, NECx and so on in URC words?

[classicsat]

NEC1 keeps repeating the code when held down.
NEC2 sends the code once, and a repeat flag continuously after that, when held down.

[johnsfine]

NEC1 keeps repeating the code when held down.
NEC2 sends the code once, and a repeat flag continuously after that, when held down.

Other way around.