can you use slides/camtasia/powerpnt with ustream

[glasshalffull]

can camtasia videos be used with ustream or if not, is there a way that I could put my powerpoint presentation on ustream and then just record the audio live to it while i flip thru the powerpoint presentation?

I know I can do the audio, but what about powerpoints?

thanks
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[billmcintosh]

If you use WebCamMax you can play videos or share your screen:

WebcamMax - Add videos, pictures and effects to virtual/real Webcam and broadcast on messengers