Since we splitted our one huge Plone site to several smaller ones we've been looking for the correct procedure to keep things running smoothly and to make updates as painless as possible. So far we haven't found the right way and every update has had some problems. Some of the problems are related to the fact that we have about 24 sites to maintain and adding a new content type to all of them means lots of work. Below are all the steps needed for update (and solutions we've founded so far). 1. Add your new product to buildout.cfg eggs and zcml list. Do this 24 times and you'll find yourself thinking there has to be better way. Luckily there is; you can extend your buildout.cfg with some general config file (eg. deployement.cfg). Most tutorials describe a way where you have those two files living side by side in filesystem and you run buildout with -c deployement.cfg option, but this doesn't remove the actual problem. We have our deployement.cfg living in diffe