What you could do, especially since you only have BV right now (I'm guessing--did you order HP?) is store elite Finns with the elite Germans, 1st line with 1st line etc. You'll easily be able to pull them out in play since they have a different color in 3rd edition (1st edition, the Finns were the same color as Germans).
That makes sense. I'll probably do that.
And nope, no HP yet! It uses too many maps that I don't have. I'll probably go with FKaC or RS next since they're in print. FKaC especially looks like it'd be a good next step because I don't think it has anything I can't play with just it + BV.