You need something like the following
resource-class mycompany
limit-resource all minimum 0.00 maximum unlimited
limit-resource sticky minimum 2.00 maximum equal-to-min
context Admin
allocate-interface vlan x
allocate-interface vlan x
member mycompany
1. No ,you cannot edit default class. You will have to create a seperate resource class
2.Define it under "context Admin". No Admin context will just be member of the defined resource class
3.No
HTH
Syed Iftekhar Ahmed