Developer installation



Ive been using xenforo on my site for some month now with 3rdparty styles and addons, but latly I have found myself in need of some custom modification.

Since I use several computers in my work, I was wondering if it is okay to install a developer/test forum at for instance but disable registering?

If no, is it okay to install it at with a password protected folder?

And if I work with other developers, can they use the same forum?

Thanks in advance.