Running two catalytic converters in series

[xvxax]

I figured this is a safe enough place to ask this question. My car is due for emissions in May up in Northern Virginia. Two years ago my car had a bit of trouble passing emissions (my car is obd1 which means it gets put it on the rollers and tested at idle, 15mph and 30mph) and I have not changed anything since then except now I have cams and a different chip. My current setup is two OEM cats running parallel. In the event that I do not pass would running two cats in series help me pass emissions, or does running a second cat have little or no effect? Why? I am not sure if I have the room to run them far apart. I would probably run them back to back, with maybe a foot of pipe between them at the most. Have you heard of anyone doing this successfully? I do not want to register my car in Harrisonburg or pay someone off. I am a tree hugging hippie on the inside, but don't tell anyone.
I am however open to other emissions tricks (race gas helps, right?) so if you have any suggestions I'm listening. I do not remember which part of the emissions test I almost failed, if I can dig up the test I will share. I think it was the PPM section.