From the point of view of the code output from VCarve Pro, there would be
no difference between the code output for a manual tool change or an
Automatic Tool Change, but your control or control software would need to
support a manual tool change.
(I.E. know what to do when a Tool Change command is received).
For example, Mach3 has an option to pause the program, stop the spindle
and wait for a cycle start before continuing with the next toolpath.
Provided that your control is set up in a similar fashion, it should work with the
standard ATC post.
Your machine supplier should be able to tell you the code format required for
a tool change.
I hope that this helps,