How do you use source control in your company?

How do you implement source or version control in your company? We are looking at using Subversion since it is quick and inexpensive to operate, however since it is not by delivery integrated with PeopleSoft we can only version control PS projects, sqr, specifications, etc. I wonder how you use version control? Do you have specific queries or data mover scripts you use or can supply to the community to extract objects or data that is not extracted in a project backup to file? That is the largest hurdle we have seen so far.

Thanks!