Embed MPEG-1 files to play at DOUBLE size ??

[iTelevise.com]

i want to have embedded MPEG-1 (.mpg) files play at Double size.

How do i do that??

i have optimized a bunch of ways
but if i DOUBLE the size of the MPEG-1 movie in Quicktime before embedding it....it won't work cross platform on PCs.

and Toast won't accept a re-sized MPEG-1 file
for VCD either.

i would think about putting some further mark-up in the HTML that i am embedding the file in...........
but how do i tell the movie to play at DOUBLE size automatically when called by the browser???