save this as nameOfYourChoice.ini
make sure nameOfYourChoice.ini and flag.bmp are in the same directory
run BuildLevel.exe (from lvztoolkit.zip)
when the browse-for-file box comes up, find and select nameOfYourChoice.ini
a .lvz named what you specified at outfile= should be created in the same directory as the .ini and .bmp
move this .lvz file into your server directory
(or place it in your main Continuum directory [eg. C:\Program Files\Continuum], then go in-game and type *putfile nameOfYourChoice.lvz [you must have sysop access])
now go in-game and go to the arena you wish the new flag image to be used in
type ?set misc:levelfiles=nameOfYourChoice.lvz (this also requires sysop or 'ownership' of arena)
then re-enter the arena (?go) to download and see your new image being used