Well, I'd have two possible answers for this, and more the philosophical kinda approach, so not really answering your query:
1. You shouldn't try to mimic Slash but rather find your own way of expressing yourselves in an individual style
or
2. To obtain a similar feel to a refined and highly skilled guy like Slash will take you years and years of intense study and repetition.
I always wanted to sound like Jimmy Page, or David Gilmour, and maybe I achieved getting closer to their styles and the way they bend, vibrate or chose notes. Still I could never come up with my own Comfortably Numb, Since I've been loving you or No Quarter. So it's kinda sad, because it is a lot of work to obtain their playing expression, but even if you achieve it to some extend after years, you are still just a copycat and can never obtain their actual skill, which is being who they are.
But anyway, it's worth while investing some time in this as it'll help your own expressiveness as well ...