Additionally if you want the preloading Text to Brand yoru organization text do following Step--
Change the SWF loading text for a single presentation
1) In PowerPoint, open a presentation (PPT or PPTX file).
2) Save and publish the presentation to your computer.
3) Using Windows Explorer, navigate to the presentation data folder located, by default, at C:\Documents and Settings\[user name]\My Documents\My Adobe Presentations\[PresentationName]\data.
4) Right-click the vconfig.xml file and open the file using an XML editor or a text editor such as Notepad.
5) In the <language id=”en”> section, add the line <uitext name=”ADOBE_PRESENTER” value=”Your_Text”/>, substituting the text you want for “Your_Text.”
Note: To change the loading text for a different language, locate the correct <language id=”xx”> section in the vconfig.xml file.
6) Save and close the vconfig.xml file.
7) To test the new SWF loading text, use Windows Explorer to navigate to C:\Documents and Settings\[user name]\My Documents\My Adobe Presentations\[PresentationName] and double-click the index.htm file.
8) Read the new SWF loading text as it appears while the presentation loads.
You can read the same if you liek to apply it for all presentations from here --
http://help.adobe.com/en_US/presenter/using/presenter_8.0_help.pdf
Search -- "Change SWF loading"
Hope it helps.
Thanks,
Anjaneai