IMPORT local profile + mail settings into TBP does not work as it should - URGENT

Hi!

I am new to portableapps, having just stumbled upon it a couple of days ago. I wanted to be sure switching to TBP would go without any problems. It seemed it would - or so I thought.
Know before you say anything I've backed up my local TB a hundred times and am therefore familiar with the general process. Still, this time is different.
I was using version 2.x before, yet not the latest version of TB, and now I am using the latest TBP version.
I've got a backup of all previous Application data and of my former install folder.
To import my local profile and mail settings into TBP I followed the steps on the website, only copying the contents of one profile folder over into the profiles folder of TBP (''\Data\profile\..). Then I ran TBP for the first time. It did not recognize a thing instead popping up the window to create a new account. I cancelled, closed TBP and then tried with the instructions from the Mozilla website, only copying over prefs.js, my Mail folder and my addressbook, clearly hoping this would do the trick. Yet I got the same result, TBP is still not making anything from my old profile & mail settings, does not even show my former accounts.

Any help? I would more than appreciate this.

PS: Please don't mistake my tone for arrogance, I'm just giving an elaborate explanation to find a solution a-s-a-p.