Wanted to buy complete pack

[SupahSourCream]

Hi, I bought just the first flatout by mistake, because I wanted to buy the complete pack, that is on sale until 04/04.
I asked for a refund but I don't know how long will it take to remove the game from my library.
So, if I buy the pack now, can I keep the second copy of the first flatout and activate it on my profile after getting the refund,maybe next week, instead of giving it away as a gift? If I can, how?