You have to EDIT the texture.xxx [where xxx stands for the respective name of the livery] and remove what is specified in the instructions. Use Notepad to edit the files.
Virtual Cockpit textures won't affect your frames except when loading them, after that they are static (don't change) such as the textures of the world around you. As Frank pointed out, they will only affect your VAS.
CRJ900ER LH Cityline D-ACKD (with real cockpit textures)
in Aerosoft CRJ liveries
Great to see you doing this! I'm sure that you get a great feeling for making something for the community to use! Thank you very, very much!