.swf file player plugin for elgg & support for pptx


we are using elgg 1.8 version. We would like to have some player in elgg that will play .swf files. We are planning to convert pptx into swf files and then we will play those swf files with player.

Actually main issue we are facing is  that we are not able to find any plugin (offline plugin) that will "play" ppts like slideshare website. It should not allow downloads of the ppts, but should  allow user to nevigate through ppts.

Happy New year,..