How to make liveries for aircraft in xp11

[Flighting123]

As a youtuber, I plan to make some liveries for toliss a319/a321neo, but idk how to do it. I once edited a png file of the toliss a319 fuselage but when I loaded, the fuselage wont show, so how do I make liveries?

[zalso]

As a youtuber, I plan to make some liveries for toliss a319/a321neo, but idk how to do it. I once edited a png file of the toliss a319 fuselage but when I loaded, the fuselage wont show, so how do I make liveries?

theres something called paint kit but I dont know if its included in the neo and 319

[Flighting123]

but the paintkit is in psd how do I open it

[A350pilot]

.psd file is Adobe Photoshop file format