WOULD SOMEONE PLEASE ANWSER MY QUESTIONS!My daughter says I'm a fool for watching lost hwy.&mulholand dr. all the time trying to make sense out of them.If none of u big-time Lynch fans cant give me an answer i guess I WILL believe her

The thing about Lynch is that he steadfastly refuses to explain his movies. He expects the viewer to craft their own unique experience from the films. That being said, there are a lot of good "interpretations" of these two films out there. Just remember that all theories are "unofficial". They don't give u enough space here in the Answer section to fully answer your questions, but here are a couple of links:

This is probably the best take on "Mulholland Drive" I've seen, and most Lynch fans pretty much agree with it's conclusions:
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"Lost Highway" is a slipperier fish, so there are a few takes on it, but here are a couple of pages I've found useful:
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Finally, u can find a lot of knowledgeable Lynch fans here:
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Read through the forums if u visit that last link. If u have questions, chances are someone's already started a topic on it.

My take on Mulholland Drive:

*Spoilers*
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I believe that Mulholland Drive is about unrequited love. The first part of the film is a dream, where the dreamer, Diane Selwyn, processes and changes bits of information, people etc... that she has experienced through her life. Most of these center around the love she felt for an ambitious and selfish actress called Camilla.

Having hired a hitman to murder Camilla, who had left her, Diane wishes to hide the guilt and pain she feels over this. She dreams that she is infact an amnesiac named Rita, who looks like Camilla, and also as an aspiring actress named Betty. When it looks like she can be happy in this dream world, her memory seeks to destroy it and remind her that it is nothing meer than a dream. This is what the club Silencio was. The Magician told the audience and Betty and Rita that it was an illusion and nothing meer than a recording. When Rita opened the box gathered there, Diane awoke, remembering the harsh cold reality of all that occurred.

In the end, her guilt, pain and memories lead her to take her own life.