Failed Emissions Help; Pt.2

[DrivenMind]

Alright, so I've failed the emissions test about 13 times now.
Since the first test I've failed, my friend and I took the following steps to try and rectify the situation;

-Took apart the EGR system and soaked it with Sea Foam Deep Creep in hopes that it would unstick the valve in the EGR system if it were clogged. Upon visual inspection of EGR system, it did not appear to be clogged.
--The car failed after this.

-Bought a new "High Flow" Catalytic Converter, and had it installed.
--The car failed after this.

-Drove around for about 100 miles to break in the new cat.
--The car failed after this.

-Bought a new gas cap, because the last on failed.
--The car still failed, but that had nothing to do with this.

-Retarded the ignition timing in 5 degree intervals, and had the car tested in between tests.
--The car still failed after this.
(After putting the timing back to nearly stock, the emissions dropped significantly to within passing in the 15mph test, but still failed the 25mph test.)

-Bought a bottle of "Guaranteed to Pass" Emissions ****. Since I was a sucker, I fell for the advertising and decided to throw my recipt away, thinking that I was guaranteed to pass.
--I failed emissions, and then I did not receive double my money back.

So suggestions anyone? The N0x is about 2000 ppm out of I believe a required 1500 ppm for the 25mph test. I've tried nearly everything to go about this in a legitimate fashion. Sadly if I would have saved the money I spent on a ****ing Catalytic Converter, and having it installed; I could have just paid off some dude to forge the papers for a lot less, and still had money in my pocket.

Additional Info:
The car has an intake, and header. But neither bypass any emissions equipment. The 4AG does not have a pre-cat in it's stock exhaust manifold, so I don't think that the addition of a header would alter the emissions, especially considering that it was designed to be hooked up to my EGR system.