VAG-COM-FAQ-1.6
From Ross-Tech Wiki
1.6 What if the PC I wish to use with VAG-COM doesn't have Internet access?
Because our software is provided to you via our download page, rather than on floppy disks or CD's, you will need a way to transfer the Self-Installing EXE file to the PC that you will be using with VAG-COM. The file fits easily on a removable USB drive and can also be burned onto a CD-R or CD-RW. Make sure that you do not run the EXE file until you have copied it onto the PC where you would like VAG-COM to be installed. You do not need to be connected to the Internet while using VAG-COM.