Describe FsTutorial/MultiModalRegistration/RegisterFileLta here.
# transform file register.lta # created by XYZ on Tue May 6 10:42:24 2014 type = 0 nxforms = 1 mean = 0.0000 0.0000 0.0000 sigma = 10000.0000 1 4 4 3.431423187255859e+00 -2.041964828968048e-01 -7.740691304206848e-03 2.756774902343750e+01 2.015136182308197e-03 1.456980705261230e-01 -3.996406793594360e+00 1.583389892578125e+02 -2.042964249849319e-01 -3.428334712982178e+00 -1.693789362907410e-01 2.647491455078125e+02 0.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 src volume info valid = 1 # volume info valid filename = TEMPLATE_FILE_PATH/template.nii volume = 64 64 35 voxelsize = 3.437500000000000e+00 3.437499761581421e+00 4.000000000000000e+00 xras = -9.972996711730957e-01 -7.120382040739059e-02 1.798351481556892e-02 yras = 6.254287064075470e-02 -9.518167972564697e-01 -3.002218902111053e-01 zras = 3.849399834871292e-02 -2.982859909534454e-01 9.537000060081482e-01 cras = 1.612358093261719e+00 1.616348266601562e+00 4.727973937988281e+00 dst volume info valid = 1 # volume info valid filename = SUBJECT_FILE_PATH/orig.mgz volume = 256 256 256 voxelsize = 1.000000000000000e+00 1.000000000000000e+00 1.000000000000000e+00 xras = -1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 yras = 0.000000000000000e+00 0.000000000000000e+00 -1.000000000000000e+00 zras = 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 cras = 0.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 subject fbirn-anat-101.v4 fscale 0.150000