Minor doc upgrade

Source/Doc/UserGuide.md

@@ -822,13 +822,12 @@ Here is an overview for each operating system:
   not cover the use of SUBMIT files -- please refer to the CP/M 2.2
   documentation.
 
-- **NZCOM** - Will run the command STARTZCM at startup.  This is 
-  normally an alias file.  You use SALIAS to edit such files.  Please see 
+- **NZCOM** - Will run the command STARTZCM at startup.  This is
+  normally an alias file, which you can edit using SALIAS.  Please see 
   Section 3.1 Creating an Alias of the NZCOM Users Manual included in the 
-  Doc/CPM folder of the RomWBW distribution.  Note that the NZCOM 
-  distribution includes a PROFILE.SUB file.  NZCOM itself is launched from 
-  ZSDOS.  The included PROFILE.SUB accomplishes this.  Do not modify this 
-  file unless you fully understand the NZCOM boot process.
+  Doc/CPM folder of the RomWBW distribution.  Do not modify this 
+  file unless you fully understand the NZCOM boot process. Note that 
+  NZCOM itself is launched from ZSDOS via the included PROFILE.SUB file.
 
 - **CP/M 3** - Will run PROFILE.SUB as a SUBMIT file if it exists in A: 
   at startup.  This mechanism is built into the CP/M 3 operating system.  
@@ -836,6 +835,13 @@ Here is an overview for each operating system:
   Executing the SUBMIT Command of the CPM3 Users Guide included in the 
   Doc/CPM folder of the RomWBW distribution.
 
+- **Z3PLUS** - Will run the command STARTZ3P at startup.  This is
+  normally an alias file, which you can edit using SALIAS.  Please see
+  Section 3.1 Creating an Alias of the Z3PLUS Users Manual included in the
+  Doc/CPM folder of the RomWBW distribution.  Do not modify this
+  file unless you fully understand the Z3PLUS boot process. Note that 
+  Z3PLUS itself is launched from CP/M 3 via the included PROFILE.SUB file.
+
 - **ZPM3** - Will run the command STARTZPM at startup.  This is normally
   an alias file.  You use SALIAS to edit such files.  ZPM3 has no real 
   documentation.  The NZCOM documentation of STARTZCM is generally correct