Questions about the Guardian Pack and Steam gifting <-- Official answer needed!

I searched, but found no clear answers to this question:
If you keep a Guardian Pack bought during the Nemesis promo, but only add it to your Steam library and/or install it after the promo ends, will it still contain the prize boxes?
(I edited out the first question, which was simple enough.)

Anyway, thanks.
Anyone have a clue on the second question, though?

My head my head my head... gahh Derpules.....
As of what I understood before you turned my brain into noodle-mush, when you buy an energy package, any package I believe, you will receive a Nemesis Prize Box. One energy package will come with a Nemesis Prize Box. Now, the Guardian Armor Pack can only be bought once per account. So if you buy that package, you will receive a Nemesis Prize Box. If you want more Nemesis Prize Boxes just buy more energy. You will only get the Nemesis Prize Boxes until July 30th. They stay with you permanently after buying the energy.
P.s. why can we only buy one Guardian Armor Pack?
1. guardian packs provide nice costume, it's a great deal, $20 on sale and actually you get 4 troll boxes
2. Steam users can buy them as DLC, and maybe trade with others later after the event, i think they can also use it multiple times.
Reguarding to the second question, I think keping the pack and using after event it will nolonger contain those boxes, because the event ended.
Actually I think we need admin to clarify this -_-

or want to troll me, Kitty. You scare me. I will add you if you promise not to claw. ;)
The thing about the Guardian Pack is that it can be bought as Steam DLC, which is giftable. That creates a fresh set of questions from the usual packs.
@Materialist: Can't use them multiple times; can buy multiples (as gifts). And yeah, would be really nice to get an official answer to the second question.

As I understand it, there's no guarantee the boxes will be in there if you open it after the promo ends. I highly recommend opening the pack now if you want them.
The guardian pack DLC doesn't actually download anything to your computer. I clicked install when it prompted anyways just for security.
The guardian pack mail is sent to the account linked to the Steam account that gets it. Any of the characters on that account can open it, but only that character will get the armors/boxes/etc. The boxes are tradable, by the way.
I'm assuming that within 15 minutes of accepting the DLC, you will receive the mail, regardless of if you clicked install or not.