I am new to installing new liveries and just downloaded one into my FS9 Captain Sim 757 texture folder.  I downloaded the file, unzipped it, and placed the texture.xxx into the appropriate folder but when I start FS9 I cannot find the livery.  I believe there is also something I have to do about modifying the aircraft.cfg but I'm not sure what that is all about.  When I try to open aircraft.cfg it says I need to search for the proper program to do that with and I'm not sure about that either. 

Any help would be greatly appreciated.  Thanks so much!!!

Seth