Zimmerman’s Research Guide will go off the Lexis Info Pro site at the end of 2015. There will be no updated public version as of January 1, 2016.
The Internet Archive will host archived editions of the Guide. To find the archived text, click here and put “http:// law.lexisnexis.com/infopro/zimmermans” (without the space) into the Wayback Machine search box.