Couple of questions re the realair spitfire

Hi Folks,I'm concidering having a play to see if I can repaint a Realair Spitfire IX but looking at the repaint kit I have a couple of questions.In the repaint kit on the Spitfire IX there are no wheels in the RASSpitIX_Ext1_T.psd file although clearly on the same file in the texture folders they are there. Do I have to copy them from the XIV and if so how do I do that, I would be using Paint Shop Pro 7.Also I want a fresh repaint so would like to "correct" the faded roundels, I tried the replace function but it won't work so I presume the fade effects is done another way although it's not the opacity thats at 100 per cent.Any suggestions gratefully received.Thanks Ron