I found a way!!!!!! See the post I copied below...................
21-Sep-2012 07:40
I just upgraded my 4s to ios6 yesterday, and most of my icons have disappeared. what is strage is that they didn't even reappear after I was offered, and downloaded/installed, updates for many of the missing programs.
How can I get my icons back on the desktop??
thanks --
BabsMC
iPhone 4S, iOS 6, just after upgrade to ios 6
This solved my question
by BabsMC on Sep 21, 2012 7:57 AM

I found the answer to my question in another thread, and wanted to post it here (with thanks to impious rocker):
Try:
SETTINGS - GENERAL - RESET - RESET HOME SCREEN LAYOUT
See the answer in context
Categories: Basics Tags: missing_icons, missing_icons_after_upgrade_to_ios_6
Cheers anyway!!