Mokafix has released Vst-Amp v2.0 and Bass Vst-Amp v1.0, free VST instrument plug-ins for Windows that provide VST MIDI drivers for Behringer's V-amp and Bass V-amp series. They show what's inside the hardware in a more convenient way, and let you have instant access to all parameters.
Simply load them as a VST instrument in your host, and redirect their MIDI output to your system MIDI output to control the hardware devices.