Hallo Jürgen

that's the same what i wrote. Install an "Virtual OS Simulating Product" like VMWare, VirtualBox, ...

Then load into this virtual Machine WinXP or Win7. If installed, your new OS will run in it's own window, near the same as a real OS. In this virtual OS you can install PENG, load USB Drivers an connect the Pronto.

Regards
Daniel