replacing microcontroler

I found this website where a guy made a a object avoiding and line following robot from a vcr, it uses a nemis microcontroller. Do you guys think i could replace it with a easy to use picaxe. And by the way do nemis and picaxe use the same programing language?

Link to shematic below


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You would need to write a completely different program, are you up for that?

Different microprocessors generally have significant differences in their assembly language, so a program written in assembly for one processor will not work on another without a lot of changes to the program.

If you write a program in a higher order language such as C or Basic, then the program can generally be transferred between processors (although it usually will require some tweaking because of slight differences in how each processor implements a high level language).