I went through the exact same problem you did, I was living the NJ , and when I took it for inspection on Aug of 2003 I failed emission marginally, a friend of mine told me to go to Pepboys and get a gas additive by the name. ( Guaranteed to Pass emissions). He said his BMW failed NJ inspection twice before he added that stuff. I was really skeptical, but I went ahead and did it , I also changed the spark plugs. ( there was nothing wrong with the other ones.maybe 5000 miles old) but I had to show the Inspection people that some work had been done. The car passed the emissions test with flying colors. I am a believer now!!!! My advice to you is go to an auto parts store and buy (Guaranteed to pass inspection Formula) It is available at Pepboy's , there are a few in NJ. I think you are going to have to fill out that form, to show what adjustments were made. I don't think it would be a good idea to show that all you did was add some additive.
Just follow the instructions on the bottle. I don't what it does but it works.

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**A few Hondas etc... etc... Not Worth Mentioning**
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90 420sel (Black with Tan Interior) Best car ever!!!!!!!