[ovirt-users] update vm in a pool

Good morning, I am new user, and I would ask you an information. I have installed ovirt 3.4. I created a pool with 3 vm, too. I should add software to 3 vm how I must proceed? 1) I must delete the vm from pool, and than add the software and then recreate the pool? 2) or there are other solution? Thank you a lot. ng