I got it, i am able to use the Copy/Paste graphic from G4 to G5... but as you said the square are not the same size. ( I see the G4 Drakon but he is dephased, out of the box, and act weirdly.
this is due to the fact that, for instance, the G4 Drakon have a 10 Square Melee attack animation and the G5 Drakon use 12...
Is there a way to set the game so the drakon animation uses AxB (A, B= lets say G4 Drakon Box size) instead of CxD( C, D= G5 Drakon Box size)
These are the mesures i can see in the G1850 (first) Drakon image pack, if it can help anyone to solve this.
G4= 80 wide by 97 tall scaled to 175
G5= ht=90 73x93