winpcap - I D/L to desktop, then hitting the icon, it went to prog files by default, and I let it go.

path lists the directories that dos searches when looking for an executable file, inc bat files.

path example path c:\;c:\dos;c:\accounts

here the command is to first check in c:\
then to check in c:\dos
and then to finally check in c:\accounts

(note the ; <semi-colon>is the separator between paths.

what I'm saying is that there might be some layers to open before you get to the Dir that holds the .exe
i.e. c:\nmap\xxx\xxx ? just browse in explorer to C root, open nmap and find the .exe

small screen ?
I don't know for certain, but am fairly certain that if it is a window that you have opened ?? to get to dos, R/Click to properties, in the general tab select window, not full screen.

if all else fails, there was an 'nmapwin' on the site