Pictaleather print setting in VPM

[Baldy]

So, I have some pictaleather folders to print and was wondering if there were any Sawgrass users out there who could recommend the best substrate setting in VPM as leather isn't on there...just the usual metal, polyester, Unisub, acrylic etc. (using Xpres paper as found it to be waaaaay better than TruPix on the soft surface items). Also, do those settings make much difference in reality?