Stored here are a number of presentations that I have done (almost exclusively on galaxies in the infrared). I have converted one to HTML using PowerPoint conversion tool. The result is not too pretty in HTML but it gives you an idea of what is in the presentation, and you can then choose to download it. For the second one, I have converted it to PDF. If your browser is set correctly, you can view it without downloading it.
The presentations were made on a Macintosh with Office 98, but they should be readable on a PC with no problem (the reverse at least is true). StarOffice (from Sun MicroSystems) is also able to read them, although with some distorsion.