Newbie questions

Okay I was doing bit researches but cant find tutorials for oclhashcat found only for old hashcat and hashcat gui. Now i've got few questions so let me start:

1. Can I use multiple dictionaries files at once example 20? Or is there anyway to make them in one huge ?
2. How can i start hashcat to crack using dict only?
3. Are these encryptions supported: md5(md5($salt).md5($pass)) - MyBB & sha1($salt.sha1($salt.sha1($pass)))??