1- Unzip all the files with WinZip in your (FS2000)/Aircraft/772xx_LT
This will over write your mdl file in the "model folder" and add 4 more textures
in your "texture folder"
This will not affect your panel or sound already install in your aircraft
1- You can install the add for the British Airways (but the bleu landing bay doors will be grey)
Same thing for United Airlines, plus the bleu engine pylones will appear grey instead.
2- Patch for these two Airlines "could" be release later.