The same way you are. i.e. just recompile everything. If you are building in place, I *think* you can get away with just running the setup.py script in the directory that has changed files. But don't quote me on that. 

On Sun, Oct 31, 2010 at 2:54 PM, Maël Primet <mael.primet@gmail.com> wrote:
Sure, this was the idea, however since it was easier 
 for me to develop the viewer as a side program, I haven't done it yet

btw I find it hard to develop directly inside scikits.image, because each time I compile the library, it recompiles everything, rather than the things that changed. How do you 
 handle developpment of new modules.?