Eureka...It works!
I changed the "userprefsphones.asp" code to reflect this change:
FROM : var chunkLength = 20;
TO : var chunkLength = 2000;
as I have over 1200 devices associated with this particular USER.
The display takes a while (3 seconds in the original asp, versus 11 seconds in the modified asp) to complete, but it gives me all of the devices on one web page!
All I do now is "FIND XXXX", then check the radio box to "dis-associate" the device and Vola! Done...
PS - I have four Call Managers/7845's so I tested this on one of the Subscriber's asp file.
\\10.2.0.20\c$\CiscoWebs\Admin\userprefsphones.asp
Then in the Browser's address field, I pointed to that Subscriber's file location (see above).
Now all I have to do is wait for Mr./Ms. Cisco to find out what I did and shake his/her finger at me.
Mr. No-Page Next guy...