I spent about a year doing this to the Telefang translation patch itself. No, not Telefang, the patch to Telefang. It was made with a version control system of "hex edit the last patched ROM to do what you want and post an IPS on the forums"... even though we were also writing tools to compress graphics and reinsert scripts (from MediaWiki, no less); as well as hand-assembled patches to get VWF text going. Needless to say this made fixing certain bugs or revising old work extremely difficult. For example, there were multiple versions of useful custom functions sitting in bank 0 (which had around 200 bytes free); developers had recreated certain utilities independently and assembled them separately into the HOME.

Also, this was a multi-version game, because late-90s mongames demanded it. We only had worked on Power Version, so anyone who wanted to play Speed Version in English was SOL. Fortunately, both versions were similar enough that once I had disassembled our own patch, and modified the title screen a bit, Speed Version just "worked". Such is the power of having source code.