looking again at your example , how would a shift be done in the basic code , i have included a summery sheet of the codes for ref , it seem each OBC 0 - 15 . 16 - 31, etc code x0 xF changes on each 16 OBC codes group

since each OBC code is different for each remote using the same function , yes i have to allow for 3 remotes that look similar , do the same function over all , but are sending different codes for the same function , i thought that having only the OBC for each remote key would save a lot of storage space on the prom.
NEC1 - IR Remote Code table Reference
SigKey # Button key FUNCTION Reference Red to White
16 or 20 steps		 Remote 1

 Remote 2

 Remote 3
OBC HEX Full Hex Code OBC HEX Full Hex Code OBC HEX Full Hex Code
1 Brightness UP 5 5F 00 FF A0 5F 0 FF 00 F7 00 FF 92 C5 00 FF 3A C5
2 Brightness DWN 4 DF 00 FF 20 DF 1 7F 00 F7 80 7F 93 45 00 FF BA 45
3 PWR Off 6 9F 00 FF 60 9F 2 BF 00 F7 40 BF 65 7D 00 FF 82 7D
4 PWR On 7 1F 00 FF E0 1F 3 3F 00 F7 C0 3F 64 FD 00 FF 02 FD
5 RED 1 9 6F 00 FF 90 6F 4 DF 00 F7 20 DF 88 E5 00 FF 1A E5
6 GREEN 6 8 EF 00 FF 10 EF 5 5F 00 F7 A0 5F 89 65 00 FF 9A 65
7 BLUE 11 10 AF 00 FF 50 AF 6 9F 00 F7 60 9F 69 5D 00 FF A2 5D
8 WHITE 16 (20) 11 2F 00 FF D0 2F 7 1F 00 F7 E0 1F 68 DD 00 FF 22 DD
9 Button 1 2 13 4F 00 FF B0 4F 8 EF 00 F7 10 EF 84 D5 00 FF 2A D5
10 Button 2 7 12 CF 00 FF 30 CF 9 6F 00 F7 90 6F 85 55 00 FF AA 55
11 Button 3 12 14 8F 00 FF 70 8F 10 AF 00 F7 50 AF 73 6D 00 FF 92 6D
12 Button 4 Flash(19) 15 0F 00 FF F0 0F 11 2F 00 F7 D0 2F 72 ED 00 FF 12 ED
13 Button 5 3 21 57 00 FF A8 57 12 CF 00 F7 30 CF 80 F5 00 FF 0A F5
14 Button 6 8 20 D7 00 FF 28 D7 13 4F 00 F7 B0 4F 81 75 00 FF 8A 75
15 Button 7 13 22 97 00 FF 68 97 14 8F 00 F7 70 8F 77 4D 00 FF B2 4D
16 Button 8 Strobe
(18)		 23 17 00 FF E8 17 15 0F 00 F7 F0 0F 76 CD 00 FF 32 CD
17 Button 9 4 25 67 00 FF 98 67 16 F7 00 F7 08 F7 28 C7 00 FF 38 C7
18 Button 10 9 24 E7 00 FF 18 E7 17 77 00 F7 88 77 29 47 00 FF B8 47
19 Button 11 14 26 A7 00 FF 58 A7 18 B7 00 F7 48 B7 30 87 00 FF 78 87
20 Button 12 Fade (17) 27 27 00 FF D8 27 19 37 00 F7 C8 37 31 07 00 FF F8 07
21 Button 13 5 17 77 00 FF 88 77 20 D7 00 F7 28 D7 24 E7 00 FF 18 E7
22 Button 14 10 16 F7 00 FF 08 F7 21 57 00 F7 A8 57 25 67 00 FF 98 67
23 Button 15 15 18 B7 00 FF 48 B7 22 97 00 F7 68 97 26 A7 00 FF 58 A7
24 Button 16 Smooth (16) 19 37 00 FF C8 37 23 17 00 F7 E8 17 27 27 00 FF D8 27
25 Button 17 Red Up 20 D7 00 FF 28 D7
26 Button 18 Green Up 21 57 00 FF A8 57
27 Button 19 Blue up 22 97 00 FF 68 97
28 Button 20 Quick 23 17 00 FF E8 17
29 Button 21 Red Dwn 16 F7 00 FF 08 F7
30 Button 22 Green Dwn 17 77 00 FF 88 77
31 Button 23 Blue Dwn 18 B7 00 FF 48 B7
32 Button 24 Slow 19 37 00 FF C8 37
33 Button 25 DIY1 12 CF 00 FF 30 CF
34 Button 26 DIY2 13 4F 00 FF B0 4F
35 Button 27 DIY3 14 8F 00 FF 70 8F
36 Button 28 Auto 15 0F 00 FF F0 0F
37 Button 29 DIY4 8 EF 00 FF 10 EF
38 Button 30 DIY5 9 6F 00 FF 90 6F
39 Button 31 DIY6 10 AF 00 FF 50 AF
40 Button 32 Flash 11 2F 00 FF D0 2F
41 Button 33 Jump 3 4 DF 00 FF 20 DF
42 Button 34 Jump 7 5 5F 00 FF A0 5F
43 Button 35 Fade3 6 9F 00 FF 60 9F
44 Button 36 Fade7 7 1F 00 FF E0 1F