can some one make me a cmx convertible for the lfs viewer for the xrt.

you dont understand, you cant just put custom cmx files in the viewer (just like you cant in game), you have to edit them with a 3d modeling program (such as 3DS Max) then make a render from that

If it sounds complicated its because it is

Download a trial of 3DSMax, a copy of the CMX importer (see Masterskinners), and leave about 2 or 3 months of fiddling, learning and playing in 3DS. Then you'll be at the stage of rendering the default cars. Then ask for a convertible version. Or spend another year or so learning how to do it yourself.

i suggest you read the thread you started, you asked for "the renderer thingy skin vjeiwer" [sic] and and were told all about how hard it is and how you CANT DO IT IN THE SKIN VIEWER, but no, you just made a new thread regardless