I have the songs and design for scgmd4:

1-Switch vs. Evil-Dog -> Round 3
2-Anthem For The Ordinary
3-Guitar Challenge - DarKsidE555
4-Impetuous Force
5-To Be Continued
6-Scapping Vibes
7-Newgrounds Rumble Theme
8-Entering the Stronghold
9--Space Pirates-
10-Jordan Rudes???
11-joker and the thief (cover)
12-Echoes-
13-Eternal Sin - The Conquest
I hope Shinki will use these in SC Guitar Maniac Dx 4.Below is my rough draft of SC Guitar Maniac Dx 4.