I found another Mazda board a few days ago and maybe you should give them a heads up to the new site. MazdaWorld.org There's not many people in there but most of them seem pretty clueless and are looking for a site that has good info.
That ecu won't work, I got the same myself, but it won't fit, it comes out of a eunos800 automatic. If I'm not mistaken it has 4 connectors
Bastian
17 inch bba racings rims, apex lowering springs, laser muffler, boost steering wheel, mazdaspeed seats, black altezza's, testpipe, oh and a polished klze with an upgraded clutch and a kl36 ecu.