To complete their requests you must do the quest "What little we know", the following are all things that can happen during your completion of that quest.
I used the thermite whats-his-face gave me (the guy getting guns for the bosses) on the bosses' weapons cache after convincing Big Sal to let whats-his-face out of his contract using a speech check. I also found the black mail tape they used against whats-his-face and I have showing him that as a task for the quest, but since he ran off and completely disappeared from the game, I can't complete that.
After I destroyed the weapons I told Cachinco what I had done, and he proposed that we kill Big Sal and the other boss during a meeting w/ them. I then convinced him, using a speech check, that he could take them out all on his own during the meeting. After that I said I was ready to meet the bosses.
However, Cachinco doesn't proceed to do anything other than stand around next to the elevators in Lower Brimstone, and talking to him only gives me the dialogue option of "We'll talk later" (or something like that).
I looked around for the bosses and found them in Big Sal's office holding guns and facing a pair of chairs like they were about to blow the furniture away, but it seems I can't continue the quest w/o Cachinco there. I haven't tried just killing the bosses on my own yet. Any one else run into this problem / know of some solution like a console command to get Cachinco to go meet with the bosses? Thanks in advance.