Lax jumped into IrC chat with me and provided the missing piece.

Each of the slaves need to uplink to each other for them to communicate.

I created an Uplink startup command on each slave using

remoteuplink -connect NAMEOFPCTOCONNECTTO

PC2 connects to PC3, PC4 and PC5
PC3 connects to PC2, PC4 and PC5
PC4 connects to PC2, PC3, and PC5
PC5 connects to PC2, PC3, and PC4

From Innerspace icon in the system tray, when to configuration, Startup Sequence, Uplink, Startup

From there I inserted the three connections on each slave PC.

FTL is WORKING on each slave now!! This has to be the easiest setup I've ever had now.

Lax indicated that he is working on putting functionality like this into a future release.

Thanks so MUCH Lax!