With the exception of SoftShadow (more on that in a minute) none of our addins are needed on a computer to play back or edit anything created using our addins.  In short there is no issue at all with creating with pptXTREME and handing off presentations to people who do not have our software.

SoftShadow is a bit of an exception.  Again, a presentation created with pptXTREME SoftShadow can be shown on any computer with or without pptXTREME SoftShadow installed.  However a computer without our software will not be able to use the Revert feature.  This means any text or shapes that have been applied a soft shadow will be converted to an inserted picture.  Therefore, a user without pptXTREME SoftShadow will not be able to edit text that has SoftShadows applied.  If you need to send a presentation to someone else for editing you can first "Save As" to a new presentation, the  RevertALL Text.  This will remove the Shadows, but allow for editing on computers without pptXTREME SoftShadow.