Just make a request for the PSX game you need codes for. I will get the codes, if they exist, and I will have a copy of the updates cheatpops.db. The currently uploaded one has been fixed for Metal Gear Solid and has Sim City 2000 code.
IT is available HERE. (right-click and save as)
A thread is available on my forums here.
I prefer that you post your request there because that is where i will check more often. The topic for request is under the Project thread.
[Also, if there is a rule against this type of post please tell me. Or if you are admin move it to the right place.]