Ok, here's how I did it:
void MyVessel::DefineAnimations()
{
// ***** GraArt animation *****
static UINT RuotaGrp[23] = {8,9,11,12,13,14,17,18,25,26,29,30,33,34,35,36,43,84,85,87,88,89,90};
static MGROUP_ROTATE Ruota (0, RuotaGrp, 23,
_V(0, 0, 0), _V(0, 0, 1), (float)(-360*RAD))...