Well, my request is a bit difficult since there's no real track to show.
But the original track is known to *everyone* -

ATB - 9 P.M. (Till I come)

Somewhere, about 4-5 years ago, I heard a superior remix of this song (and there's thousands of bad ones out there), where specific, "bubbling" type of arpeggiator (?) melodyline was added to support main guitar melody, though it played different tune.

Yes, bubbling synthline. The kind of thing I love in songs.

It was *extremely* similar to one that can be heard in Signum feat. Scott Mac - Coming on strong track, here:

http://www.increator.pri.ee/trance/003.mp3

And both melodyline and synth (not so precise) sound can be found in my all-time favourite, Beam vs. Cyrus & The Joker - Launch in Progress

http://www.increator.pri.ee/trance/004.mp3

Now I'm desperate to find out how's that mix called or who made this.
If anyone has loads of remixes of this song, and anything may sound similar, please check them and help me out. Thanks!

Huh? I found it out (by pure coincidence) myself: Seems that Signum - same that I posted as synth example - is ALSO the remixer of that ATB song.
Well, this thread is depleted now.