It does not necessarily have to with the video settings, kr-07 errors
may also be caused by other things. Although standard VGA is a good
starting point, as standard VGA works. You can change video mode later on.
Please check the readme.txt file, it is your geos folder och
geos\document folder. The error message indicates troubles with the
files settings in config.sys, but it could also be a file system error.
You have to check. Check also the geos settings for the operating system
you are using.