I use FragMotion (Supports MDL7), EarthSculpture (With HMP export plugin) and Corel Paint Shop Pro X2 (Not as powerful as PhotoShop but just as good and not a hefty price tag.
Windows XP SP3 Intel Dual Core CPU: E5200 @ 2.5GHz 4.00GB DDR3 Ram ASUS P5G41T-M LX PCIE x16 GeForce GTS 450 1Gb SB Audigy 4 Spyware Doctor with AntiVirus