1. es gibt schon 5.1
2.
http://mbm.livewiredev.com/download/MBMSISITE.zip
Simply put you temp sensors in MBM to none, close MBM, unzip the 2 files over the original files (you might want to backup the original files), then start MBM.
settings for the K7S5A should be:
Sensor 1 = Sis950/ITE8705-2 = case
Sensor 2 = Sis950/ITE8705-3 = CPU
Sensor 3 = Sis950/ITE8705-1 = system/sensor chip
Correct voltages sub-type is probably 4