in the directory:
C:\Program Files\Firaxis Games\Sid Meier's Civilization 4
Double-click _Civ4Config
NOTE: this will fail if you have "Hide protected operating system files" and/or "Do not show hidden files/folders" turned on, in Windows Explorer (this can be changed under Tools, Folder Options, View Tab). The reason it fails is because the file is a .ini, which WindowsXP considers a System File that could be harmful to the operation of Windows if it is improperly modified (therefore it won't let you edit it, by default)
I had a brain fart looking for the ini file as well when it didn-t turn up in a search
so then.....using Windows Explorer
In Win XP 64 pro, I went to the Main CIV 4 folder
clicked on it, then tools, then folder options
in folder options I picked file types, then went down to> .INI Configuration Settings
clicked on it to highlight it
THEN
clicked on advanced and near the bottom of that box was a box to click
always show extension
I said ok to that change....and it gave me a shortcut in that directory to open it with notepad
and shazam there it was
I clicked on it and edited the cheat code
and set the option to -ask- instead of 1 which was full screen
I just opened the game
and wham right there was an option if I wanted full screen and I said no
it opened the game in a window
which I wanted so I could reference things here at the forum while playing the game
one thing with the window
I had to click on the box at the top right to maximize it as it was a little off at the start
but it is just dandy now as I actually have the game open while posting this
and a big thanks to the problem solvers here