Got my ECU chipped at Motorsport Developments for £180 ish plus VAT IIRC.

You can only run standard boost without risk of internal engine damadge unless you get it set up to run more boost. Some chips only allow you to run increased boost to about 14psi anyway. Other chips allow unlimited boost.

The fueling is not controlled by the chip at all. This has to be set up and is a manual process.

The actuator controls boost not fuel. Unless you mean the electromagnetic fuel pressure actuator which is controlled by the black box, not the silver ECU. The EMFPA itself cannot flow more fuel unless you set it to.

Blue red blue is a Series 1 ECU
Blue red white is an S2 86 spec ECU
Blue red black is an S2 88 spec ECU
Hearts hash diamonds is a 90 spec ECU.