i set it up on my car, im using a b15 speedo and its pretty dead on accurate no issues. its very very easy to set up the b15 speedo is only 2 wires and you you can wire it to a electronic speedo cluster and then straight to your aem, im sure you can go staight to aem and say screw the cluster if you wanted to
first determine how your solenoid is plumbed, i like to set mine up so that 0 is gate and 100psi is max boost
then, set your boost wg duty cycle map to 50% in all load zones
make sure boost wg out is ticked off as well as boost from load if your using a maf sensor
then go into the advance boost settings> boost target methods> boost by vss
set boost target speed table to a little over your wastegate spring, i am using a 7psi spring so i set my first target to 8.19 based on the "boost target comp table"
now the way this map works is that it will refer to the boost wg duty map, so because that map is set to 50% then 0 on the boost target comp table is 50% duty cycle on the boost wg duty map. therefore -50 would be wastegate and +50 would be max boost.
i pulled out about set mine to about -40 on the boost target comp map to get 8 psi your number obviously would be different. now work your way up to your max boost tuning each point after
8.15, 10.85, 13.51, 16.71 ect, all the way to your max boost ect (you can also skip every other parameter and use calculate to get the one inbetween, this is obviously faster)
each time you have to adjust the boost target speed table to w.e your tuning for.
when your done the aem will know what duty cycle refers to what psi. then you can set the boost target speed table to ramp up the boost via vss
once thats set you can do the boost error duty cycle, which basically helps the aem add or take away duty cycle to achieve the correct amount of boost similar to tuning your iac.
i hope i helped but this is the simpliest way to set it up. the manual has a good description as well as
this write up
http://farnorthracing.com/DG_Guide_to_AEM_boost_control.pdf