instalation:

copy plugin to plugins folder
for example in: C:\Program Files\Autodesk\Maya2013\bin\plug-ins

copy script to scripts folder
for example: C:\Users\ALEX\Documents\maya\scripts

using:
1. run python commands:

import SanctusMatchCamera
SanctusMatchCamera.matchCamEditor()

2. choose image
    you need previously remove lens distortion. do not crop!!! do not perspective distortion!!!
    work properly only with 3 point perspective

3. align guide lines with perspective lines by color RGB>XYZ

4. when special locator positioned in zero - you on right way

5. click export