I call these command "express" commands because they are quick
to type (just 2 characters), and I use them a great deal.

Sorry I haven't documented them (other than this):

XS "eXpress Switch directory" is a supercharged "CD" command - it lets
   you create a file of named destinations and instantly go there with
   just a portion of the tagname. It can also handle identical trees on
   different devices/systems and easily switching between them.
   (note that 'XS' is just one row over from 'CD')

XF "eXpress Find" is a quick way to search a selection of files in
   your for one or more strings - and easily view where those strings
   occur.

XC "eXpress Compare" lets you view up to 4 files side-by-side (vertically
   or Horizontally) and compare them, scanning for differences etc.

XT "eXpress Treesearch" scans a directory tree and locates files from your
   current directory, also let you know if they match and how they differ.
   An ideal way to answer the "where did I put it" question!

The interactive utiltiies will display available commands if you press '?'

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eXpress Switch directory - Dave Dunfield - Jan 31 2010
        XS nickname                     <= change directory
        XS =element[;element...]        <= select default directory elements
        XS /D                           <= display nicknames and Directories
        XS /P                           <= display nicknames and Path defs
        set XS=element[;element...]     <= override directory elements
        set XS=                         <= return to default elements

XS  is a CD command which takes you to specific directories using a nickname.
It also allows elements to be automatically inserted into the directory path,
making it easy to select between identical subdirctory trees/projects/drives.

The file XS.DAT contains the nickname to full path descriptions:
        root    @0:\@1
        source  @0:\@1\source
        include @0:\@1\include
Elements are substituted into the path where '@0-9' occurs:
        XS =D;PROJ1
        XS root         -> CD D:\PROJ1
        XS source       -> CD D:\PROJ1\source
        XS include      -> CD D:\PROJ1\include
The nickname can be matched with partial input:
        XS s            -> CD D:\PROJ1\source

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eXpress Find - Dave Dunfield - Jan 31 2010

Use:    XF      filespec [string ...] [options]

opts:   /C      = Case sensitive search
        /H      = display HEX codes in browser
        /S      = do not Sort filenames
        T=n     = set Tab interval

Copyright 2004 Dave Dunfield
All rights reserved.

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eXpress Compare - Dave Dunfield - Jan 31 2010

Use:    XC      <file>... [opts]

Opts:   /DC     - ignore letter Case when scanning for differences
        /DL     - ignore Leading  whitespace when scanning
        /DT     - ignore Trailing whitespace when scanning
        /DW     - treat all Whitespace as single space when scanning
        /SC     - ignore letter Case when searching
        /SL     - trim Leading  whitespace when searching
        /ST     - trim Trailing whitespace when searching
        /SW     - treat all Whitespace as single space when searching
        T=n     - display Tab size              [4]

Copyright 2008 Dave Dunfield
All rights reserved.

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eXpress Treesearch - Dave Dunfield - Jan 31 2010

Use: XT <input-pattern> [tree-path] [options]

opts:   /E              - only count Exact matches
        /S              - do not compare Size
        /T              - do not compare Timestamp
        L=lines         - set # Lines in output         [24]
        O=[+-]DIMFN1S   - set Output mask               [F1]
                D = Directory being scanned
                S = Statistics
                I = # Input files
                M = Matching files
                F = Failed (mismatch) files
                N = files Not in input
                1 = files not occuring once in tree-path
