I would encourage reading parts of the very controversial Naked Lunch (1959) by William Burroughs. It is another face of the Beats as a counterculture, and both Kerouac and Ginsberg collaborated to help Burroughs publish it. Something interesting about this work is that it was released in France almost ten years before being allowed in the U.S.
You can also have a look at Claude Pélieu’s work. He is considered as a French Beat writer, resorted to cut-ups, and collaborated with Burroughs. Some of his works are in English, such as With revolver aimed… Finger bowls (1967).
When it comes to Kerouac’s influence on the movie culture, I would encourage you seeing Easy Rider, realized by Dennis Hopper in 1968.
I recommend you to listen to those two songs that influenced and inspired Kerouac, and that were the first steps of bebop:
Parker, Charlie. Ornithology, 1946. http://www.youtube.com/watch?v=DEeISJ0wr48
Gillespie, Dizzy. Night in Tunisia, 1942. http://www.youtube.com/watch?v=BQYXn1DP38s