Okay - I must be a complete donut....
I have the excellent POSKY 738 for fs9 (winglets, Boeing house colours. I have downloaded from FlightSim the XL Airways re-paint b738poxl.zip
I follow the instructions, the problem I have (using Vista by the way) is editing in notepad with the new details for the aircraft config file - it won't let me save the changes.
Any ideas or pointers? I'm pretty new to this sort of stuff so no techno speak please!