Stores here are not as easy going as in many other countries since the general guideline is 'once the package is opened, consider it sold', so checking out or asking for the firmware myself is not an option to me...
As for upgrading to 4.5, I believe Luigi's Mansion also comes with 4.5, so if that's the case, I might go with that as I've already played DK on Wii and to me it was a pretty uninteresting
co-op platformer, especially when it's compared to the likes of New Super Mario Bros. Wii and the more recent Rayman Origins. Anyway, I was wondering if there's a way to hopefully bypass needing a 4.5 game, but I guess there's not.
Not to forget, thanks a bunch for your reply, oh and please don't apologize for being awesome!