Tools|Options|General|Uncheck "Ignore other applications"
(xl2003 menus)

--- or ---

Close Excel and
Windows Start Button|Run
"C:\yourpathtoexcel2003\excel.exe" /unregserver
then
Windows Start Button|Run
"C:\yourpathtoexcel2003\excel.exe" /regserver

The /unregserver & /regserver stuff resets some of the windows registry to
excel's factory defaults.

JMay wrote:

Everytime now that I Double-Click on an *.xls file (in my history) a new
instance of Excel (2003) Opens. xl2003 is still my Version of CHOICE even
though I have installed xl2007 and xl2010 (Bet) starter kit. How can I
correct this so that xl2003 remains as my DEFAULT Excel file, but an
additional INSTANCE DOES NOT OPEN?

TIA,

Jim

--

Dave Peterson