We are team of few Delphi developers who have been using VSS since years (I know it\'s a pity), but we don\'t use any of the advanced features of VCS, so it was working fine
You should at least take a look at JVCS. It integrates with the Delphi IDE, it's written in Delphi and is open source, and you can choose from a number of databases including Firebird to store your archive in.