Definitely do a CWE if you're going to take more than a few of those pills. Do a search if you need help with that. Codeine has SOME potential to be recreational, because after all it is metabolized into morphine by your liver. Oral morphine isn't as great as it's hyped up to be, but it can get you high if you take enough or if you don't have much of an opiate tolerance.
Based on my understanding, the liver enzyme CYP2D6 is what causes codeine to be metabolized into morphine so if you can induce this enzyme you can theoretically convert more of the codeine to morphine in your body. Alcohol is a moderate inducer of CYP2D6, however, mixing CNS depressants isn't recommended. If done in moderation it probably won't kill you, but I can't give you doses because I don't know what your tolerance is. If you don't have an opiate tolerance, maybe you should just try the codeine by itself. Another way to force more of the codeine to be metabolized into morphine by CYP2D6 is to inhibit the CYP3A4 enzyme which is the liver enzyme that metabolizes codeine into inactive metabolites. White grapefruit juice does an alright job inhibiting CYP3A4.. So, with codeine some grapefruit juice and a couple drinks can help potentiate it. Although you really want to keep the alcohol to a minimum. The cons to doing alcohol + codeine is increased CNS depression, increased alcohol neurotoxicity, and increased stress on your liver if you're taking APAP + alcohol.