This is understandably quite confusing in
PowerPoint 2008, but it looks like it can
be done. From the Print dialog, select
your printer, and under the Presets
drop-down menu, there is another drop-down
menu (probably unlabeled) that should say
"Copies and Pages". Change that to read
"Paper Handling". You should now see an option
that reads "Pages to Print". From there, you
can select Odd Only, Even Only, or All pages.
Normally, it would seem that you should be
able to select the "Selected slides"
option in the print dialog. However, unless you
have actually selected slides using
Cmd+click in the slide sorter pane BEFORE
you get to the Print dialog, you can't select
this print option. There also appears to be no
way to actually type the numbers of the slides
you want to print - you just have to select them
before going to the Print dialog, or else
do the odd-even thing I mentioned above.
Hope this helps!
Jeff