The Picaxe chips themselves you could do whatever you
wanted with them, but saying that you have used
a picaxe or promoting it as a picaxe device you would
have to be careful what and how you said it, and also
include that Picaxe is a trade marked name
( then again if you say nothing who will ever know what's inside ? )
The Program Editor software must not be included,
supplied, given away free or sold with any product
you have that has a Picaxe inside it.
But there is nothing to stop you saying where the
software is available for download, after registration.
Obviously there is a lot more to the story than this.
If you are not sure contact Rev-Ed directly or E-mail
Technical they will piont you in the right direction.
Q2: In some apps you could write a direct PIC / PICAXE
replacement code and get it to work.
It all depends on the I/O pins used in the original and the
speed of the program, in many cases a Picaxe by design
will run much slower than a raw PIC.