yes it an advanced 109. it looks like a p82 only has 1 cockpit instead of 2 and it has the 109 armmament doubled
I'm not sure if it even got of the drawing board
No, it was not an 'advanced' Bf 109, nor was there ever a "Me 603". You are confusing it with the Me
609 which paired two Me 309's into one airframe similiar to that of the Bf 109Z. Before you get your hopes up too much, it never went beyond the design phase.
ack-ack