Dash Rendar in the Nintendo 64 cutscenes looked more like a brown-haired, younger and rougher George Lucas with a rough shave instead of a beard. In the PC edition, he looks more like the original concept art for the character.
In the first level of the game, where you fly a snowspeeder in the Battle of Hoth, was the inspiration for Rogue Squadron.
Dash Rendar is the only character developed from the Star Wars franchise that actually made it "back" to the movies. You can see his modified starship, the Outrider YT-2400 lifting up and taking off from Mos Eisley as Luke and his gang enter the city in the new revised sequence featured on the Star Wars: Special Edition.
A revised edition of the N64 title (the major difference between the two versions being 3D cutscenes for the PC)