Hi,
if you know what a pointer is, you might sort all those var addresses into an array.

Code:
var *joyAxe[2][6];

void joyAxe_startup () {
	joyAxe[0][0] = &joy_raw.x;
	joyAxe[0][1] = &joy_raw.y;
	joyAxe[0][2] = &joy_raw.z;
	joyAxe[0][3] = &joy_rot.x;
	joyAxe[0][4] = &joy_rot.y;
	joyAxe[0][5] = &joy_rot.z;
	joyAxe[1][0] = &joy2_raw.x;
	joyAxe[1][1] = &joy2_raw.y;
	joyAxe[1][2] = &joy2_raw.z;
	joyAxe[1][3] = &joy2_rot.x;
	joyAxe[1][4] = &joy2_rot.y;
	joyAxe[1][5] = &joy2_rot.z;
}
...
vMove.x = *joyAxe[0][1] * nSpeed * time_step;