Roger,
I went to the Professor Messer site last night to review again. He has a great amount of info on the New Sec+ 501. as you prep I would add this to your check list of prepping. Check the site for the next Sec+ study Group they are really helpful if you cannot make it to one he records them and puts them up for view. I found this info to be the most invaluable to my passing the Sec+ 401. The being free was even better. I did buy a book from him because I felt over everything. He was part of the reason I passed and personal experience in the field.