I have converted a few sets other then the ones from the classic packs. They are mostly fine, some I have had to remap. They are textured with photos, and to much changing is not an easy task.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.