My subscription will be expiring very soon.
I'm currently using the 1-user version of ZoneAlarm Internet Security Suite 6.5.
I want to
purchase the 3-user version, as I've recently acquired an additional computer that I want to protect.
I'll probably purchase the 3-user version at a local store (hopefully, on sale).
Can I purchase the 3-user version of ZAISS and use that license key to renew the subscription for the 1-user version currently installed on my computer?
If so, is it as easy as just entering the new license key on the Overview/Product Info page and clicking on "Change Lic."?
Can I then download and install the trial version of ZAISS 7.0 onto the new Vista computer and use the retail-purchased 3-user license key to extend that subscription?
(I would just install the out-of-the-box 3-user version onto the Vista computer, but it's my understanding that the packaged version doesn't work with Vista.)
Any advice would be greatly appreciated.

Operating System:Windows XP Pro
Software Version:6.5
Product Name:ZoneAlarm Internet Security Suite