Please help - connecting through Facebook

Okay, so. I'm really bad at explaining so please bare with me, I'll try explain as simple as possible. My account, "Memorilla", isn't connected through Facebook. This didn't really bother me untill the free frog thing came up, so now I want to connect my account "Memorilla" through Facebook, if it's possible. And I also already have a registered account which I made through Facebook, and I'm after getting the frog present (which I didn't open) on it. Will my Facebook Habbo account interfere with connecting "Memorilla" through Facebook? And if I happen to connect "Memorilla" through Facebook, will I still get my frog? And also, will I be able to remove "Memorilla" from Facebook after I try recieve my frog?
And is it possible to remove my first account I registered through Facebook?