Here's the advanced codes for all the buttons on the original Sony remotes:

Sony SAT-T60 (RM-Y809): SAT/0639
() ... Sony SVR-2000/3000 (RMT-V303): VCR/0636
(*) ... same for both SAT/0639 and VCR/0636

0 ... 142 (*)
1 ... 018 (*)
2 ... 014 (*)
3 ... 016 (*)
4 ... 012 (*)
5 ... 019 (*)
6 ... 015 (*)
7 ... 017 (*)
8 ... 013 (*)
9 ... 146 (*)
channel up ... 082 (*)
channel down ... 078 (*)
power ... 079 (*)
enter/jump ... 140 (*)
display ... 176
up arrow ... 064 (221)
down arrow ... 060 (002)
left arrow ... 063 (000)
right arrow ... 067 (254)
select ... 065 (225)
TiVo ... 003 (125)
guide ... 129
clear ... 141 (252)
advance ... 237 (064)
replay ... 220 (*)
live tv ... 252 (060)
play ... 208 (*)
pause ... 206 (*)
rewind ... 204 (*)
fast fwd ... 211 (*)
slow ... 236 (*)
record ... 207 (*)
list ... 242 (108)
thumbs down ... 062 (*)
thumbs up ... 066 (*)
menu ... 178
delimiter ... 160


VCRs ---------------- <VCR Group>  Sony TiVo  SVR-2000 
----------------------------------------------------------------------
0636  064 Advance       220 Instant Play  060 Live TV         062 Thumbs Down 
      108 Contents List 064 Jump to Live  220 Instant Replay  066 Thumbs Up   
      060 Guide         108 List          129 Sony                          
                                                                             
      
     VCR.
     142 0...............0                  018 1...............1                  
     014 2...............2                  016 3...............3                  
     012 4...............4                  019 5...............5                  
     015 6...............6                  017 7...............7                  
     013 8...............8                  146 9...............9                  
     204 REWIND..........Back               078 CHANNEL DOWN....Channel Down       
     082 CHANNEL UP......Channel Up         252 CLEAR...........Clear              
     002 DOWN............Cursor Down        000 LEFT............Cursor Left        
     254 RIGHT...........Cursor Right       221 UP..............Cursor Up          
     140 ENTER...........Enter              140 RECALL..........Enter              
     140 RECALL..........Enter/Jump         140 ENTER...........Enter/Jump         
     211 FAST FORWARD....Fast Forward       211 FAST FORWARD....Forward            
     140 ENTER...........Jump               140 RECALL..........Jump               
     159 PROGRAM.........Menu               206 PAUSE...........Pause              
     208 PLAY............Play               079 POWER...........Power              
     207 RECORD..........Record             207 RECORD..........Record On/Off      
     204 REWIND..........Rewind             225 SELECT..........Select             
     236 SLOW............Slow               125 MENU............Tivo