There's plenty of tutorials on the forum, if your still stuck then ask a question and I'll get back to you.
Maby thanks, good luck, and all that other stuff I usually say,
NOTE: My custom DSGM version is still unreleased, and I am not currently working on it. I started when DSGM 5.12 was the latest and so I thought I'd call this DSGM 5.2, however James has since then released a version 5.2 (not related to this version), so for now since this isn't released I will stop giving it a version number. Refer to it now as "Yoshi's version" or something similar.