You can't get very far as an NT administrator, programmer, or support person without knowledge of batch file programming. Recommended texts for NT Scripting. Some good online resources are:

• NT Scripting
• DOS Batch Programming
• Timo's Batch file links
• Batfiles : The DOS batch file programming handbook
• Batch Programming Stuff
• Tom Lavedas' Batch File Applications
• Rob van der Woude's Scripting Pages
• Batch programming elements
• Ancient Art of DOS Batch Files
• Batch stuff
• Internal and Intrinsic Commands

Related Tips:

Change batch files default editor
Create a registered Windows NT service out of applications
Windows NT Resource Kit Utilities useful in batch files
Enhancements in NT4.0 commandline programs
UNIX-like command line freeware mail sender
Windows NT Login Script Tricks and Tips

Tim Hill's text on command line scripting is outstanding. If you have an extensive background, writing bat files, forget it. Otherwise, get it.

and for the future (which is now!):

Windows scripting host is a different animal entirely to batchfile-like scripts. Much more powerful. Native scripting language for NT2000 but available for NT4. Start studying now. Includes builtin support for vbscript & jscript with addins available for perl and other scripting languages. Extraordinary powerful and subsequently it can be very complex.

See Windows Scriting Book Recommendations