There's a sticky over on "New Members" you may want to read (we're trying to decide whether to punish people for reading it, or punish them for not reading it, or whether reading it is a punishment itself....
We've had some interest in OPOTA here from time to time - you may be able to help out. When I had to get a CHL in 2004, I tried to use my OPOTA certification. No luck.... 1968 was too old....
Please don't hesitate to jump in with comments or ask questions.