@The-revenge just delete preprocess file and recreate data3.
Next try to set bunch of files that can fit on DVD9 (probaly setup.exe, data1.cab, data2.cab, data3.cab).
Next create setup.ini next to setup.exe
Code:
[ExtractSettings]
FreeArcFile1=Data1.cab;DestDir:{app};Disk:1;
FreeArcFile2=Data2.cab;DestDir:{app};Disk:1;
FreeArcFile3=Data3.cab;DestDir:{app};Disk:1;
FreeArcFile4=Data4.cab;DestDir:{app};Disk:2;