Thanks to Zanthor for his walkthrough. Only modification is the following multi.iss file which works perfectly for my set up: 5 boxing, single computer/monitor, dual core processor.

Code:
function main(int clients) 
{ 
while ${Sessions} < ${clients} - 1 
waitframe 
variable int nSession 
nSession:Set["${Session.Right[-2]}"] 

run windowsnapper 
wait 2 
autolayout 

/* Setup Hotkeys */ 
switch ${nSession} 
{ 
case 1 
globalbind is${nSession}_key "F7" "windowvisibility foreground" 
break 
case 2 
globalbind is${nSession}_key "F8" "windowvisibility foreground" 
break 
case 3 
globalbind is${nSession}_key "F9" "windowvisibility foreground" 
break 
case 4 
globalbind is${nSession}_key "F10" "windowvisibility foreground" 
break 
case 5 
globalbind is${nSession}_key "F11" "windowvisibility foreground" 
break 
} 
/* Launch Repeater */ 
run repeater 
ui -load skins/wowskin/wowskin 
ui -load -skin WoWSkin repeater 
}