You'd have to draw almost all the lines again anyways due to the XRT shading on the skin, so why not make them 2048x2048? Anyways, if you feel like you could use the original XRT LFSW 1024x1024 layered .psd, pm me. In any case, I'll hereby give you permission to use and modify the existing design for other cars
Just on a side note, did you know you can put as many pictures as you want in just one post?
First select 4 pictures, then click "upload", wait for them to be uploaded then select another 4 and so on.
I'm not saying that specifically for you, I'm just saying it because I've seen many people making double posts or many separate posts because they think "4 pictures is the limit per post".