How to add custom parameter to hardware board settings?

Hello!

I'm learning to create custom targets.

Approach described here looks very promising for me, but as far as I don't have any idea about reference target to start with, I have started from scratch:

tgtFolder = 'c:/project/myTarget';
tgt = createTarget('myTarget', tgtFolder);
hw = createHardware('myHw');
map(tgt,hw,'myHw');
show(tgt);
saveTarget(tgt);

At this point my target hardware resources looks like this:

However CPU Clock have no sence to my particular target, and I want to remove Clocking group at all and replace it with my own groups and parameters.

How can I achieve this?

Also I want somehow to access desired parameters from

loader.LoadCommand = 'matlab:myHook';

hook.

Please advice something.

EDIT:

Probably this is not possible to fully control target hardware resources appearance via that interface as it was designed for particular processors and not flexible enough, so I got down to manual editing xml files and now I'm able to make my own parameters and groups there.

However I still need to figure out how to pass hCS and buildInfo to my loader.LoadCommand.