We ain't here to tell you how to get high sorry man.
Remember that Norco's have APAP in them and in high doses a CWE is neccessary and if you don't know how there is a mega thread which you can use the search engine for or just google... It's very very simple.
I would say your tolerance is lowered a bit from months off use so go easy, however you didn't tell us what your tolerance was in the first place.
Mixing CNS depressants is a dangerous road to go on as it leads to respiratory depression.
~Closed as this isn't what BDD is here for. PM with queries.