Disabling modules, user roles

I have no need for the Purchase Order or Contracts modules.

Is there a way to remove them for the main admin user? I created a new role without access to those 2 modules, but couldn't assign the main admin user to any other role than SDAdmin... (ie. the "Assign Role" option is not there for admin #1.)

Along the same lines, it would be nice if the access matrix was allowable PER USER, and not per role. Right now, if I want to assign special access, I have to create a whole new group for it, and only Technicians can be assigned roles, not users..

I'm not trying to get around the # of technicians license, but rather tailor user access a bit better.

Lastly, it would be helpful to have the Reports module in the roles matrix, so I can tailor access to that as well.

So far, I really like what I see in SD+!