Personally, working in an environment where things have to work right otherwise my head rolls- I would not do that even if my boss threatened to fire me otherwise.

Please don't mess with the internals of the system- and the filesystem hierarchy created by installations. You can write a shell script to make installation easier of the modules you need.

Just, don't just copy over stuff from x.x/ to y.y/ - bad juju.

Don't do that.