I kinda need some help

I found a list of hashes (they say type md5 Vbulletin) and salts (3 characters)...
can someone please explain me how can I recover them?
I can t find something like : md5(md5($pass).$salt)
I am so noob so please I do need some help...

my english is bad sry...

have a good day and thanks so much