I used SleepKiller's tool and extracted all scripts from three versions(original, GOG, patch) of common.lvl and shell.lvl, then compared them in Total Commander.
Here is a list of scripts which were changed by GOG:
ifs_mpgs_galaxylogin -new one
Some scripts changed both in v1.3 patch and GOG's version: ifs_missionselect_pcmulti, ifs_mp_sessionlist, shell_interface and ifs_mp_lobby.
I placed almost all GOG's scripts in v1.3 patch except ifs_missionselect_pcmulti because it destroys Instant Action.
Also I edited ifs_mpgs_pclogin to avoid replacing of shell_interface.
DOWNLOAD - http://www.mediafire.com/file/yrab2a52t ... h-r130.exe
.ZIP VERSION - http://www.mediafire.com/file/9y5g82s5h ... h-r130.zip
MODDB PAGE - https://www.moddb.com/games/star-wars-b ... patch-r130