EDIT: The Solution I found was to increase the 2GB Disk into a 5GB Disk and it work perfect.
Im having a problem while installing right after you select the .pat file and start to install I keep on getting "Failed to .
The files i'm using are "Nanoboot 5.0.3.1 X64 ISO Edition" and "DSM_DS3612xs_4493.pat" Downloaded from Synology.
Error: https://www.dropbox.com/s/2qs7eoeofsdw5 ... .09.01.png
VM Settings: https://www.dropbox.com/s/z3ct817e1pg1p ... .12.08.png
(Synology-Install.vhdx is a fresh 2GB Fixed Size)