Yeah, unfortunately you can't copy between layers directly anymore. You have to load it into another sheet, or use GCOPY, which would be very tedious to work with without seeing what you're doing...
Are you trying to combine these sprites with those already existing on another page? If so, you can't use LOAD because that will erase everything already on the destination page; you'll have to find the top-left coordinate of the region you want to copy, then the bottom-right, put those in GCOPY, and set a different destination page and the X and Y coordinates of where you want it.
Next time you go into the editor, the copied region should show up on the destination page. For example, if you wanted to copy everything from X=0, Y=0, to X=16 and Y=32, copying from page 2 to page 4 with the top left corner being at 128,96, it'd be somewhat like this:
GPAGE <displayPage>,2
GCOPY 4,0,0,16,32,128,96
Just replace display page with whatever graphic page you want the user to see at the time. I'd you want it to use the page already in display, use 'GPAGE OUT VP,WP' then replace the <displayPage> part in the command I gave you with VP.
If you'd like my help, I'd glad to give you some pointers, although I've already got another update for one of my games in progress, so I don't really think I'd like to do a collaborative project quite yet.
