The first person to release the tutorial (I believe) was Rampant Pogo from BlueShadowz. It seems like a coincidence that you post a tutorial after he did.
Well you can't really test the placements seeing you don't have a Kit to RTH. If you do as I instructed above you will have the X, Y, Z coord's of the lights, then you must mess with the values to see which fit's the truck.
Just open Alteration (Meta Grid), find the SID for the lights in the [vehi] tag under [Attachments] (Look through the chunks). Once you found the SID your looking for look for the same SID in the [mode] tag under [Markers] (Look through the chunks). There you should have the Coordinates of the lights etc.
What? No Im not sitting on the Forklift.... It works fine for me: (This was taken back in January, so no lights >.<) http://img243.imageshack.us/img243/9744/forklift200109.png
If anyone, probably not, but go to the Warthog.mode tag and use these coordinates if you are using a Fork Lift: Marker: [3: markers chunk] Instance: [0] X: -0.5 Y: -0.5 Z: 0.15 i: -9E-10 j: 8E-10 k: -1.5E-08 w: -1 Marker: [70: markers chunk] Instance: [0] X: 0.1 Y: 0 Z: -0.5 i: 0 j: 0 k: -1 w: -1 That should sit it perfectly.
I made this a long time ago. It's the very, very early version, I might show you the finished project later. http://i41.photobucket.com/albums/e281/JIME108/Main%20Menu%20Edits/GreyMainMenuv03.jpg?t=1246755489
All this program is, is a CON Resigner. There is nothing special about it. Every CON resigner can do what this one is doing. Having that said NO ONE here will every be able to make a Dev Modded Personal file successfully run on a retail Xbox 360.