Letter from Tim was very helpful. At least he admitted that this track has nothing to do with the original Time Has Come, but still didn't say much.
2. this is listed as a remix but is actually a totally original track with no relation to the time has come. I believe that portishead used to start their sets with this track when they played live. There is a whole other story attached to this I believe.
Did anyone find out anything more about this track?
One small insignificant thing I discovered myself is that it uses a sample "The Game. Playing to survive.", which is used also by Jurrasic 5 - The Game. (http://www.youtube.com/watch?v=_TIsU9v1ND4&t=0m5s)