PICKit 2 as logic analyzer, 6th AUX pin

hi,

i have copy of PICKit2, i want to use it as logic analyzer. I can see logic on pin 4 (PGC) and pin 5 (PGC) as analyzer channel 1 and 2 but there is no pin 6 (AUX) this pin is also used as channel 3 for logic analyzer,

my question is how can i update my pickit2 so that i can use channel 3 also, i have copy of pickit2 having PIC18F2550 on it, and i do not have schematic for this. thanks.