Update drivers and Time zone on the Norton Ghost 15 recovery disk

Hi,

Is it possible to manually update the LAN drivers on an already created recovery disk.I am running Windows 7 and NG15 needs Vista drivers.I did read a post where I can extract the drivers on a usb drive and then load drivers when i boot up the recovery disk but that would be tedious.I could mount the boot.wim file,add the drivers,save the wim file on harddisk.Then create an ISO of the recovery disk and replace the boot.wim file.

By mistake I had set the wrong time zone for the recovery disk even my pc was set to the wrong zone.Can I change the time zone in the already created disk or I will have to go through all the process of creating a new Recovery Disk?