[ovirt-users] How to simulate update of ng node from 4.1.7 to 4.1.8

Suppose I download both the isos: the fixed one for 4.1.17 here: http://resources.ovirt.org/pub/ovirt-4.1/iso/ovirt-node-ng-installer-ovir... and the 4.1.8 here: http://resources.ovirt.org/pub/ovirt-4.1/iso/ovirt-node-ng-installer-ovir... and I want to simulate install of 4.1.7 from the iso and then update of the ng node to 4.1.8 without internet access but using in some way the 4.1.8 iso (or something derived from it) on my local lan, how can I do? Thanks, Gianluca