Now you lost me -requirements?
First of all: I really want to thank again all the people who have been so helpful with this problem!
Here is a quick mind map I did and it lacks many things but I hope it collects even somehow all the ideas/problems people have been giving to me. If it is missing something, please comment about it! :)
Though I am in the Internet, I also do have a life to attend, so I'll continue puzzling with this later! (Even I wish I could just focus on this problem now :) ).