It's basically the IAT mod, which I have on my site -- but it only works for OLDER model trucks, and doesn't work at all with the new PCM. I also got results where 0-60 time DROPPED when I did it. I was excited about it, because I know people with older trucks that benefitted.
It's based on something that USED to work, but doesn't anymore. The main benefit was a TIMING advance anyway, not fuel enrichment. That too is no longer controlled by the IAT in any useable way at lower temperatures.