oooh, looks like everyone straightened you out C !
50Mb file definitely too big
even a max ISP size 3 - 5 mb file is a lot of download time on a dial up modem (cable or dsl like HSE is no biggy)
even zipped into several parts may be too big - some graphic formats don't compress much
either save each slide as a separate file - still pretty big files!
or
can you save each slide in a different (smaller format)?
this is coreldraw10 right?
if so they have a publish to pdf feature and a publish to html feature
either one will likely be smaller in size and both formats are pretty universal
with the html you can get yahoo geocities or one of the other freebie sites and publish it as a webpage, then just send out the url so people can see it
it's a powerful program, but there's likely a few other easier ways to distribute it than in it's original form
try the help file or even the unopened manual for more ideas
if it's not coreldraw10 - identify the exact program name, and we'll come up with more