if u mean putting 2 files into 1 iso as in merging it. You need something like winrar or jzip to open it and then just place the file where u need to in there
Simply open Commmand Prompt. Navigate to the folder that contains all the parts, and enter this command: copy /b example1.iso + example2.iso + example3.iso + example4.iso finishedexample.iso . This...