You'll need to get your fingerprints done by a professional and submit those to the FBI, essentially. The FBI can send you an e-mail document reply or can mail it to you. I highly suggest applying online as I found the turnaround to be VERY swift (I submitted on a Thursday and got a reply on the WEEKEND. This was by couriering it overnight so it arrived on the Friday morning, I believe). Not as hard as it sounds, assuming you can get your fingerprints taken pretty easily.