I think if you become lucid, and make a point to "talk to your subconcious" that you should recognize dreaming easier, it should work.

I find Waking Life and the Dream World almost like two different worlds, so I think that in the DW, the more you do to tell yourself it's a dream, the better you'll get at it. LDs should become easier, longer, and more vivid.

Now as far as trying to learn to play like Slash, all I have to say is this...

Son, set your sights a little higher. For example:

Michael Romeo
Yngwie Malmsteen
Steve Vai
Stevie Ray Vaughn
Vinnie Moore

(Notice Eddie Van Halen is NOT on the list)

I think if you picked up Symphony X's "V" album, you'd forget all about Slash. If you like NeoClassical rock that is... When I first got that CD, it blew me away and actually forget about Malmsteen..