Hi Teresa
I don't think that Moodle can create a PowerPoint presentation. However, you can use some tools to display a PPT in Moodle. Or you could use iSpring Ultra to convert PPT into flash. Some links:
http://moodle-tutorials.blogspot.com/2008/01/import-powerpoint-presentation-into.html
http://wiki.answers.com/Q/How_do_you_add_PowerPoint_files_to_moodle
http://www.sameshow.com/other/moodle.html
http://www.shambles.net/pages/learning/ict/moodle/
Hope this helps.
Frankie Kam