Photoshop :: Increase Margins For Materials In CS4...

I've been a user of DeepPaint3D with Texture weapons for many years. Now I got Photoshop CS4 extended, to be able to use Photoshop filters and do other things DP3D isn't capable of without having to im-/export my materials from / to DP3D. Which is when I ran into a problem. How do I increase the margins (you know, that 'pixel overlap' part that's beyond the UV mapped area on a material) in PS CS4 extended? Ten years old DeepPaint3D with Texture Weapons can do it, even 'for free' Blender can do it (when baking maps), so where do I find that option in Photoshop?It's pretty much unacceptable to have a material 'end' at precisely the border line of the UV mapped area; particularly if, at some point of time, said material would have to be resized to a smaller scale (which is usually when a few pixels get eaten away at those borders). I've really been searching up and down and googled a lot but could not find it (but then again, maybe it's not called 'margins' in Photoshop.