can some one tell me what program to use or anything
If you actually want to model your own aircraft you have to use a 3D modelling program such as GMax
If you just want to paint a model use Photoshop or any other image editing software.
Hope this helps!
Also if yer just wanner do texture's you dont just have to do it on Photoshop you can also use Abacus Fs Repaint V2.
But its costs around $30.00