precomp.exe & precomp042.exe are the SAME, easier to use precomp.exe ( less to type )
IF your using freearc/precomp/srep then you DONT compile Installerscript.iss
just edit setup.ini & input your info there.
[InstallOptions]
ApplicationName=Max Payne 3 ---> this is name of Your game
Publisher=Codemasters ---> Manafacturer
MyExecutableName=showdown.exe --> Name of the games EXE
MyExecutablePath= ( put the path here if not in root of gamefolder)
SaveGameFolder=
GameSize=9646
Lang=de,en,es,fr,it,pl,pr,ru
LangUI=0
PrecompVer=042
[InstallSettings]
GDFBinary=game_gdf.dll ---> IF it has one if not delete the section
[ExtractSettings]
FreeArcFile1={src}\Data1.cab;DestDir:{app};Disk:1; PrecSrep:1
FreeArcFile2={src}\Data2.cab;DestDir:{app};Disk:2; PrecSrep:1
FreeArcFile3={src}\Data3.cab;DestDir:{app};Disk:3; PrecSrep:1
FreeArcFile4={src}\Data4.cab;DestDir:{app};Disk:4; PrecSrep:1
IF you dont use precomp/srep then the above PrecSrep:1 should be changed to PrecSrep:0
ALL the INFO is in the tutorial post
http://fileforums.com/showthread.php?t=92805