In Game Guru x is right and y is down.
When you get them into the editor and run test game. Go into the matrix settings (tab tab) and make sure the entity shader is on highest.
Take the ambient slider and bring it down to around 15.
Take the objects slider and bring it up to 30.
Take the global specular slider and set it to 66 or better.
See if that brings out your normals. Then if the appear reversed, then invert the green channel in the normal map.
That will let you see them both ways and decide which is best for that model.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.