Pioneer SC-95, SC-97, & SC-99 Receivers

[Trux]

I picked up an SC-95 last week and am slowly in the process of setting it up. I intend to run 5.2.4 with 4 in-celing speakers. When looking through the setup options in the pioneer menu and the SC-95 manual, I can't seem to find an option for a 5.2.4 setup. I know I read that this receiver is capable of running 5.2.4 but I'm not sure what option I need to select in the receiver's menu to achieve that. I'll be running all the speakers through 2 external Emotiva amps.

I already have 2 in-celing speakers installed about 10-12 feet to the left and right of the primary listening position (PLP) and probably a 2-3 feet in front of it with the tweeters pointed toward the PLP. Those have been acting as my "surrounds". Where would you all suggest installing the second 2 in-ceiling speakers which I assume would be my Top Middle speakers? Directly over the top of the PLP to the left and right or do they need to be more towards the front sound stage?

My current setup is a 5.1.2 and the 2 in-celing speakers that are installed are my "surround" left and right. The 2 "back" speakers which are part of the traditional 5 are hung 6-8 feet behind the PLP on the wall to the left and right.

Can anyone offer some suggestions? Thanks in advance!