Quoted:
Cash it out, call the adminstrator and tell them you want to cash out and to NOT, I REPEAT NOT take any Taxes out. You have 90 days to roll your money into a retirement account before taxes are due. If they will not release your money still contact a lawyer and have them send a nasty note may cost you a $100 or less or call those federal outfit listed by other posters. KY has an outfit called Ominbus at state level maybe your state does too that may also help. It''s is your money and fight like hell to keep it. If a company is hinky about releaseing your retirement money they are up to something shady with it and the squeaky wheel gets the grease so to speak.
This is really bad advice. The LAST thing you want to do is take physical possession of any funds. Even if you do roll it over into a new 401k or IRA immediately, you really leave yourself open to a dry fucking by the IRS. You will need to do it ASAP and keep multiple copies of any and ALL paperwork.
Make a few calls, contact the correct people. I've rolled over half a dozen previous employer 401k's. Usually it's all handled by the company you are rolling it into or the company that is holding your IRA if you roll it into that rather than the current company 401k.