Multiboxing with 2 pc's is harder (currently anyway).
It is hard because you are running two character sets, and each one is effectively independent, but they can receive input from the other PC. Each character set has a Slot1, and each character set has a Slot2, etc.
When you are on PC1, and on the toon in Slot1, and you hit your follow key, there are two commands that occur.
1. Target Slot 1
2. Send Follow command.
When you are on PC2, and on the toon in Slot1, and you hit your follow key, there are two commands that occur.
1. Target Slot 1
2. Send Follow command.
So, the problems are, that on the character set in PC2, the Target Slot1 needs to have the correct variable keystroke configured to select the character on PC1, but it might not because the Quick Setup Wizard doesn't know you are running a multi PC configuration so it does not try to account for it (which is pretty tricky anyway).
You can check out the variable keystroke configuration by looking at Character Sets -> Your Character Set -> Slots -> number -> Variable Keystrokes. There is a table for "Target Slot 1 is now Fx". On PC2 you can configure this so it will work to select characters on PC1. Take note that you will only be able to configure upto Target Slot 4. You will not be able to use PC2 to drive from in this configuration.
Some info on the Per Slot Targeting
http://www.isboxer.com/wiki/Common_modi ... eting_keysIf you want to be able to drive from PC2 as well, then you will have to figure out the smarts (it's too late for me to try), and probably use some advanced targeting to send a different command to the other PC vs the local PC.
http://www.isboxer.com/wiki/TargetIt will probably get easier to use virtualisation instead and when you activate a slot it sends the correct Target Slot x, rather than use the default setup which utilises a variable (the {SLOT} bit) in the actions.
note: I probably rambled a bit because it is late and I haven't tried to map this out correctly.