I use sc_selchar.pac, but mine's 4 mb...
anyways, PSP7 makes things easier, in my opinion, to edit... :/
I use black as my BG color before adding a custom mask to it...
to make the mask,
I just make a copy of the image use the wand and select all the black
(or magenta at first in case there's any black areas you don't want selected)
and then invert the selection.
in that selection, I fill it with white and soften (blur) the entire image...
gives you a nice mask to use