I don't know whcih setup codes are built in the 7557. The service remote uses the Pioneer IR protocol, with device 168, and that is not a typical Pioneer device number.

So if your remote accepts setup code Video (DVD, DVR, VCR, etc.) 0059, then it is possible to manually program the buttons to have the GF1381 functionality.

a) assign Video 0059 to a device mode button (e.g. DVD)
b) Tap DVD (or whatever button setup code 0059 was assigned to)

1) Press Setup (or what ever button is used for assigning setup codes) until 2 blinks
2) Enter 994 (If the 7557 has a LCD screen, a different procedure may be necessary)
3) Tap Setup
4) Enter the 5 digit EFC from the table below
5) Tap the button to assign the function to.
The remote should blink twice.

[To remove these assignments, don't do step 4 and instead do step 5 twice.]

Function EFC (function number)

0	00181	0
1	00185	1
2	00183	2
3	00187	3
4	00180	4
5	00184	5
6	00182	6
7	00186	7
8	00053	8
9	00057	9
num 10	00250	31
chap	00165	64
chapter/time	00123	19
chapterskip back	00107	83
chapterskip fwd	00103	82
clear	00168	69
cx	00054	14
digital/analog	00052	12
display	00171	67
escape	00234	95
frm/tim	00169	65
mon-a	00246	30
p.run	00102	86
pause	00245	24
play	00122	23
rep.a	00037	72
rep.b	00164	68
scan back	00121	17
search	00167	66
side-a	00040	77
side-b	00038	78
speed-	00166	70
speed+	00170	71
stereo	00039	74
stillstep back	00101	80
stillstep fwd	00100	84
stop/eject	00118	22
test	00230	94
tv/ldp	00058	15
x3 back	00233	89
x3 fwd	00105	81