Some questions i hope some one can help me with

1. I have enabled light gun=1 lightgun=mouse dualguns=1 in the mame config
the first gun seems to work fine now..
but when im in game it appears the second gun is allocated the same device (mouse) is there anyway to get it load as a separate device?
2. do i need to change any axis data within the game configuration as with alien3 i couldnt get it to register the input at all, if i say select an axis it always comes up with "mouse X"
3. is there anyway to get the x and y axis working with the aimtrak game controller option rather than a mouse, the reason i ask is because my pc games - house of the dead/virtua cop etc (the m2 emulator stutters on my machine) will only allow me to allocate one mouse (i.e player1) if i allocate the game pad to controller 2 the x+y axis dont seem to work - i also tested this from the game controllers section in windows.
4. is there any way to calibrate the gun within mame itself
thanks you

ant