As you probably know We had a workshop
http://wikimania2013.wikimedia.org/wiki/DevCamp/Schedule on Wikimania's DevCamp about using PWB for people who are interested.
It went very well thanks Legoktm (a BIG THANK YOU) but It was a very big problem that installation of PWB is not user-friendly (and It's worse when people try to install rewrite instead of trunk) The main cause as far as we faced during the workshop (on different computers) is dependencies.
Maarten (multichill) has suggested we change setup.py and generate_user_config.py and make a auto-generated list of needed dependencies (based on OS or other things) and ask user when he/she wants to install that which one you need! and install it right away. another suggestion (my idea) is an example:
When someone doesn't install i18n submodule. Codes breaks (error that says "import i18n, there is no module named "i18n"" or something like that) but we have to catch this error and ask a question and ask do you want to install i18n submodule? and maybe a user doesn't want to install it (just wants to run it in English WP) We have to let the user run the code.