.skp? google scetchup, right? download the professional version, load them with sketchup, save them as .3ds.import them into your main cad program and save them as obj.

ps forget about using the existing materials, in order to do it right, you need to make a new texture map.i recommend making the raw work with windows paint and then finishing it with gimp.make sure you have the gimp .dds-plugin installed.

how would i do the texture, you said paint but how do i do that exactly, is there a certain method that i have to use. then once in gimp what do i do then.