They can be copied and pasted into Course-Builder form. Several choices need to be made, but all result in avery useful Web presentation. However, this does not upload all the bells and whistles. It does handle images, but not slide transitions, sounds, videos, special effects, etc. Results in exact transfer of everything and preserves all multimedia attributes.
Files are huge, of course - in fact, some times too large to be practical.
Easy to do, assuming you know FTP . Downloads functioning file. User must have PowerPoint 98 or PowerPoint 97, or special free viewer. Viewer is available for both Mac and Windows. 98 Viewer allows people who use Microsoft PowerPoint to share their presentations with users who do not have PowerPoint.