Here’s a fairly well-documented rebraining of the Robosapien, done by students and teachers at University of Beira Interior in Portugal. They replaced the existing MCU with a Texas Instruments MSP430. The docs go through identifying the current hardware components and what it all does and then the rebraining. I’ve wondered how difficult such a thing would be. It doesn’t look trivial, but it’s clearly doable. They now plan to add a wireless comms capability, a digital signal processor (DSP) for handling voice commands, and to develop a Windows app for controlling the bot.