SweetPain Blackrain

This is where the "not tech savvy" part comes in. Download to my computer how? Erase and then save as what format so it stays invisible and doesn't become a giant white spot? Reupload as what format? And that's just the start of my questions. Thank you for the help, though, I really do appreciate the effort.

For those of us not tech savvy *points to self*, I don't think I'm following or maybe I'm just seeing this the wrong way. First, I'm using the Parasite Demon avi which has its own alpha layer since it's a full mesh body, but ai've added the legs from the Kinzart Southern Dragon (no market link available) that uses invisiprims to hide the lower leg and foot. So, the basic body is hidden well enough by the alpha layer, but the prim body for the Parasite Demon then cannot be altered to hide the feet and lower legs so I can remove the invisiprims from the dragon legs since the body is a full, one piece mesh. From what I'm reading in these posts, it's looking like there is no solution to my particular issue? Thanks in advance for any advice anyone can give.