You could try to compress or "zip" them then email them. I'm not sure
how well they will compress, it may depend on the file type that you are
using. Unless you want to upload them to a private area on a web server
and have the other party download them there are few options other than
email. Or use a file sharing program like kazza (yuck!) and open your
computer to all sorts of hackers and what not!
If the photos (files) are very large, as is often the case with digital
photos, use an image viewing/editing program and convert them to
lossless jpegs. Make sure that you do the conversion on copies, not on
the originals. The originals should be kept safe in case you botch
things. You should be able to convert with the software that came with
the camera or with one of these:
http://www.irfanview.com/
http://www.djuga.net/retriever.html
John