[CTPP] CTPP - Part 3 - summary level question

I just received the CDs for Part 3 of the 2000 CTPP and have attempted to follow the instructions on how to run through the various options. I have had problems trying to access different summary levels. On the bottom of page 1 of the instructions for working with Part3 it states: "First option button: "From RESIDENCE Geography out" -- click this radial button if you want to know the workplaces for residents in a particular area. For example, if you want to know where workers who live in Suburb A commute. Do they go downtown, or to the largest employer, or do they go all over the region." Since I would like to know how many workers living in specific suburbs actually work downtown, this appeared to be the way to go. HOWEVER, if I select the summary level for the place of residence, I cannot re-select the summary level for place of work. How can I get "downtown" as a work destination, which is at the TAZ level if the only summary level option available is "place"? Apparently I have to identify the TAZ for each place of resident in order to get TAZ of work. Yet I cannot identify TAZs of work - all I get to select is the county of work. So I get all TAZs in the county. Am I doing this incorrectly? Any thoughts? Bob