IR Remotes have a mark and a space some remotes have the mark as the high
(1)
and some have it as low (0)
these are different lengths.
I have found that easy way to decode these with a pic is to forget about
((IR CODES))
and just make your software look at the pulse train.
 To pick out which are long and which are short pulses; this can be seen on
a scope.
All you do when you have the long and short is to count the pulses on the
remote pulse train
then deduct unwanted pulses and make your code look at the pulses that
change when you press different buttons on remote
this is usually the last 14 pulses (8 usally gets you most remote buttons)
Then set up a loop in your code that checks the amount of  long pulses in
the last 8 pulses
put this into a temp reg,when you have counted  8 pulse changes from high to
low ect,then jump to next part of your code
you will then have a value in your temp reg for the button pressed.
each button will return different values in this reg
the rest is history


remote_
              MOVLW *******                      ;this is the amount you
want to wast
              MOVWF COUNT3
TST1_
              BTFSS REM
              GOTO TST1_
              CLRF TEMP
STP1_
              BTFSS REM
              GOTO STP2_
              NOP
              NOP
              NOP
              NOP
              NOP                                         ;you may have to
play with this time for differnt remote
              NOP
              INCF TEMP                             ;check this reg to get
your long pulse value
              GOTO STP1_                           ;test again till end of
pulse
STP2_
               MOVLW *******                  ;this is the lenth of the long
pulses get this by first testing one  long pulse
               ADDWF TEMP
               BTFSS C
               GOTO SHORT_
LONG_
              BSF PULSE,0
              RLF PULSE,F                             ;must be long pulse
              DECFSZ COUNT3
              GOTO TST1_                              ; do it again
             GOTO next part of code_
SHORT_
             BCF PULSE,0                               ; you will now have a
value in the pulse reg
             RLF PULSE,F                                ;that will change
for different button presses
             DECFSZ COUNT3
             GOTO TST1_
             GOTO next part of code_

there is probably a better and shorter way to do this
let me no if you find it