Hi

I'm using Powerpoint 2007 as a DTP tool so that I can assist academics with doing conference posters. I normally create A1 or A2 size posters but now I need to print up to a banner size (a popup banner is a tall poster that is attached to a stand and usually rolls up into a case. See sample here: http://www.reads.ie/display-stands.php)
The actual dimensions are too big for Powerpoint (over 7 ft tall) and so I've halved them and intend to have them printed at 200%.
But I want to check will the images I use (logos etc) retain their high resolution of 300 dpi?
I am using File > Save As > PDF or XML and selecting PDF.
Then I will have the PDF printed to twice its size.
Any input would be much appreciated.

By the way, as a long time quark xpress user for graphics and layout, I was pleasantly surprised to find Powerpoint capable of producing some very decent quality print material.

Thanks!
Miriam