what configuration do you need? a map sensor reads pressure from it's vac line and then returns it in voltage, there's nothing to configure? you need its ramp table values, ie what voltage = what pressure, but thats it. be sure to note map sensors are rated in sweeping pressure not boost, so a 3 bar map sensor is actually 1 bar below vacuum and 2 bar positive pressure or "boost". so a 3 bar map sensor will cap out at 2 bar boost.
you mention a homemade vct controller, your tune and engine will run like ass if you dont have this spot on.
to eliminate endless fault finding you should get your VCT controller work spot on on the dyno before doing anything else. a homemade device could be the cause of endless hours of fault finding and debuggin why, so be sure to nail this before even cotemplating tuning anything else.
the gearchange boost response will because you have removed the stock bov, reconnect it with the factory setup to re-use the dumped airflow/pressure from gearchange, this will improve gearchange response.
for the most response ensure a good cold air intake, lots of ignition timing, a good stable tune with good AFR's
make sure your boost contorller is setup correctly to, to test this run unlimited boost (blocked actuator) on the dyno and ramp it to about 1bar and then back off (be careufl, its unlimited boost) and note the RPM it wakes up at. this is the best possible "on boost" RPM and your boost controller should match that. ie if it winds up 10psi by 3400rpm when you fit and setup your boost controller, it should still make 10psi by 3400rpm as it did in unlimited boost and then you set it to run whatever. an often mistake is mangled or guessed ramp / duty which may add extra lag to the boost build stage