Well the cryptic instructions had me totally bamboozled too, so I decided to write my own [that's part of what I do that for a living

]
VERSION CMSMS 1.0.2
- CREATE A USER
- CREATE A GROUP
- SET THE GROUP PERMISSIONS
- GO TO PAGE AND ASSIGN USER TO IT
CREATE A USER
* login to your CMSMS Control Panel
* select USERS & GROUPS from the Menu
* select USERS
* click ADD NEW USER
* type a name for the User [I chose 'Harvey'], and type password twice
* fields with * must be completed, so that's the first 3 on the screen
* make sure the little 'Active' checkbox is checked/selected
* click SUBMIT button
* you will now see a list of Current Users
CREATE A GROUP
* select GROUPS
* click ADD NEW GROUP
* type a name for the group [I chose 'Test']
* make sure the little 'Active' checkbox is checked/selected
* click SUBMIT button
You are now back at a list of CURRENT GROUPS
You should be able to see the NAME you just created.
To the right of the name you will see some little icons.
First icon is green symbol for ACTIVE.
Second icon is a set of keys - for PERMISSIONS [these are the pages/etc you will allow people to access].
Third icon is two little people [head and shoulders] - for ADD USERS.
* click ADD USERS
* click the name of the new User you just created
* on the right hand side, click to select the little checkbox
* click SUBMIT button.
SET THE GROUP PERMISSIONS
* under Users & Groups, select Group Permissions from the Menu
* choose the name of the group you just created, from the popup list
* click on SELECT GROUP
* you will be presented with a long list of 'actions' and 'permissions'
* decide what you want your user to have access to, and click each box on the right hand side to select each item
* if you DO NOT want your User to modify ALL PAGES, do not click ' MODIFY ALL PAGES'
* if you want your User to have access to ONE PAGE ONLY, do not click any boxes on this page
* click SUBMIT
* you'll be back at the Group Permissions page, and will see the message 'Permissions have been updated'.
NOW, LET'S GO TO ONE PAGE AND ALLOW THE USER TO ACCESS IT!
* In the top Menu, select CONTENT then PAGES
* choose a page and click its link
* when the page opens, you will notice three TABS just below 'Edit Content'
* click the middle one, called OPTIONS
* at the bottom of this Options page, is a field called OWNER - usually this is the name person who designed the site, and can also be the owner of the website
* if you click the name, you will also see your new User's name - do NOT select the name
* just below this Owner's field, is another long skinny field, called 'Additional Editors'
* you will see your new User's name here.
TO ADD YOUR USER AS AN ADDITIONAL EDITOR
* click your new User's name [as an Additional Editor] - just click once to select it
* now click the SUBMIT button
* at the top of the list of Pages you will see, 'The content was successfully updated'.
You're done! To test it works, logout of the CMS, then log back in as the new User - and you should only see ONE page for you to access.
TO REMOVE YOUR USER FROM BEING AN ADDITIONAL EDITOR
* go to OPTIONS tab for the page, as mentioned above
* click your new User's name [from the Additional Editor list at bottom of page] - just click once to select it
* on a PC - hold down Control key and click once to remove highlight
* on a Mac - hold down Command/Apple key and click once to remove highlight
* now click the SUBMIT button
* at the top of the list of Pages you will see, 'The content was successfully updated'.
Good luck! PS - hope I didn't miss out any steps! Let me know if I have

PPS - If I should have put this somewhere else, please let me know.
Cheers
WebGirl