dynamic path to import publisher factory

Hi,

imagine several packages for the same application, installed 
simultaneously on the same machine. These can be for example a recent 
stable/demo version, and a bleeding edge dev version. I want to be able 
to run them concurrently, but independently. To run with either 
simple_server or scgi_server, I am executing the respective python 
scripts as new processes, that implies that if I adjust os.path in the 
calling process, I cannot pass that env info to the child process. Or 
can I?

Looking at the code, I wonder whether it is (a) a good idea and (b) 
possible to be able to pass on to whichever server a parameter to add a 
specific dir to its os.path. I was imagining that either the factory 
param takes the form of
- str : as it is currently...
- (str, str) : a 2-tuple of str, where the frist str will be 
interpreted as a dir to add to os.path

Then, the quixote.util.import_object(name) is similarly modified, e.g. 
to:

quixote.util.import_object(name, add_to_path=None):
	if add_to_path is not None:
		if add_to_path not in os.path:
			sys.path.insert(0, add_to_path)
	...
	rest of function as as currently

Another way would be to add an "add_to_path" option to the various 
server scripts, that will then be handled separately (and before) from 
the import_object() call.

Does this sound reasonable, or is there a much simple way to do this?

mario