megersquirts strength is its own weekness
the pure fact that it is a diy system that can be config'ed to run almost anything makes it a bit of a mine field with soft and hardware setup.
you need a good understanding of how efi works as well as a bit of eletronics skill.
its best to build your own if you can then you know you will have the hardware setup you need (ebay buyers should check what thay are buying first)
best place to get support is the msextra forum (if your running a extra firmware)
what you trying to squirt i will try and point you in the right direction and check my info to see if your engine is supported.