The intro pad sounds very similar to the pad used in DJ Gwange - Motionless, would like someone else's opinion though on whether it's a direct sample or just a similar synth sound.
First note in this has been used in Remarc - Ice Cream & Syrup, Dillinja - Sovereign Melody, Plug - Feeling So Special as well as a few other tracks I can't recall off the top of my head.
The intro melody on this is sampled in Ultravibe - The Guardian Angel. http://www.youtube.com/watch?v=8L1XYnK-zwU Appears at 1:55. http://www.youtube.com/watch?v=NrCPODANSuE PS: Someone fix the player on the main site!
That is sick! Oh, it's that version? I didn't think it'd be that as it doesn't sound much like Flex's other material of the time, where as the Mindgames remix somewhat has that sound of his.