Mods often come with installation instructions. Make sure to follow these carefully to avoid corrupting your game files.
With the -server switch, NTSD 2.7 can act as a debugging server that other WinDbg or CDB instances can connect to over TCP/IP. Ntsd 2.7 Download
Go to the official Little Fighter Empire and locate the NTSD 2.7 section. Mods often come with installation instructions