You might try the wayback machine.

[Link: archive.org]

Just search for PadOne and look about 4 links in.

PadOne Music control for Pronto
Specially tuned for the Philips Pronto model TSU9600/TSU9400

The perfect Home Controller has become even better! This PC software package enables the Pronto TSU9600/TSU9400 system to do full music management from your PC with Windows XP/ Vista (32bit) and Media Center Edition 2005.

Not sure you will even want to bother at this time.