Lismore Software Systems today announced today the release of Guest PC 1.9.3, an update to the company’s application that allows users to easily create and manage virtual x86 computer on a Mac. Changes in version 1.9.3 include: the MMX instruction set has been added for better compatibility which has also resulted in Guest PC performance increase; FPU emulation bugs have been fixed and now Nokia PC Suite can be used fully; and the support for Mac OS X printers has been greatly improved. Guest PC requires Mac OS X 10.3 or later, and is priced at US$69.99.