Software Compatable with other versions?

[Michael Yanowitz]

Hello:

  I am still using Python 2.4.3, I haven't upgraded yet.
However, I would like to know if my 2.4.3 programs will run
in 2.5 without modification.
  Is there any way to test that my software is compatable
with 2.5 (or any other version), without actually installing
that version?:

  I have been told that the .pyc are not compatable. Is it
possible, to convert a 2.4.x .pyc to a 2.5 .pyc?

Thanks in advance:
Michael Yanowitz