Hallo!
well, with pix_multiimage, i'd have to to change the names of the files,
yes, but that's maybe easier than compiling GEM on windows ;)
with pix_buffer, i'd have to use the open message, that's undocumented and (i just had a look at the cvs logs) that's not in the v0_90 branch ...
yes that's true ...
good luck, LG Georg