hmmmmmmmmmm...
Well, since there is no any reply to this mistery, I will tell you.
Play the first track, Master of Disguise, and then rewind it from 0.00 to -1.26.
You've heard it well, REWIND it to -1.26.
Yup, the hidden track is BEFORE the first track.
I thought it was impossible as well.....until La Masquerade Infernale CD.
Maybe not all CD players can rewind the CD from the first track, especially the PCs, but try on various Discmen and you will be delighted probably as much as I was when I discovered it.
And about the track......It is full of some techno beats played backwards and the voice is drowned in echo effects, probably reading Revelations from the bible ("...And the Earth was harvested") - and after that you just watch display :
-0.01; -0.00; 0.00; 0.01 and then starts well known keyboard intro from Master of Disguise. Arcturus are geniuine!
The hidden track is probably called Philosophy of the Crazed, as it says in the innersleeve (beneath the CD, when you lift it up, on the left there is a line "A secret audio information can be found if sought" and on the right there is "Philosophy of the Crazed").
Enjoy!