I agree with what was said above, if you already have ecmlink, get the boost control package. If you look at a lot of boost controllers on the market they use the same or similar 3 port solenoids as the one ecmlink are using, so its all in how its controlled. Even look on the net for replacement solenoids for a few of the popular brands they appear to be similar blue colored 3 port solenoid with a different sticker.
Why buy a separate unit when you can do it with your current software, or if you have only the lite version spend the money on going to the full version and the boost control package. Upgrade form lite to full version is 125 and the solenoid they use is 39 plus probably the same in postage. So your probably looking at around the 200 mark.
Then as a bonus you have some cash to spend on more go fast parts.
http://www.ecmtuning.com/wiki/boostcontrol