Just btw, in DOS you can also try using:
cd "program files"
rather than
cd progra~1

As for the screen... a huge border? I'm not sure what you mean. Try checking the properties of a shortcut to command.com (in this case, a .pif file) for options. (Right-click on your shortcut to command.com and select 'properties')

For instance, set Properties : Screen : Initial Screen Size to 50 lines, or Properties : Font to some small font type...