I'm not familiar with the amp you have, I haven't tried it myself but you would normally use the model that tries to emulate a Marshall, it would probably be "Crunch" and/or "Hi Gain".
MAB's sound is achived by pushing the upper mids a lot, in the 1 khz area. Not use too much bass but not little. Dial back the treble and presence a bit and let the upper mids do the cutting.
Adding some delay in the 300 ms range and maybe some reverb too but not much.
Also, a tubescreamer in front of the amp is normally used, he has a signature overdrive with T-Rex, otherwise an Ibanez TS9 or TS808 would do the trick also.
Although adding a tubescreamer in front of a digital modelling amp might not be the best thing to do, so you can probably skip that. But you could always try.
For the neck tone, use a fairly high output pickup with thick mids and lots of definition. Like his signature pickup "HWS" by Dean has.
As I said I'm not familiar with the amp but I'm looking at the specs of it. For the delay try using the "Tape Echo" model first, use what ever delay you find sounds the "warmest" to get a nice "analog" feel to it.