The problem here is i've already compressed the images as much as
possible in photoshop so would require some pretty major work to get
it smaller than 225kb. The pdf options don't allow to determine the
resolution or compression of those two images and hence can't
control the output size very well.
Distiller is the adobe PDF creation tool but i haven't seen what it
can do with word document or if it works at all.
Distiller usually works as a printer driver.
Something I've noticed on windows is that if I drag/drop a picture
onto a page it converts it to its bloatware format, however if I use
insert:picture it leaves it jpeg sized. It's made the difference
between 2MB files and 100kB files before. I forget if it makes a
difference on the Mac side - our drag/drop interface is much better.
Andrew