I got this off some other Tutorial, try and see if works:
Use im2liso to change the iml file to iso. iml2iso should be in the same directory where exported iml file is. Go to start and run menu, then browse to iml2iso.exe and then click open. After that write
Command:[exported iml file].iml[name of the game].iso
Then click ok. this will take several minute.
Correct me if I'm wrong