OK this is not really a PHP question but rather an SVN question in the context of a PHP project.
We've got an extensively modified project based on OSCommerce. A couple of weeks ago a designer obtained a copy of our source code and started to make layout changes to it. In the meantime, we developers continued to make changes to the code base for functionality reasons. Anyone who has experience with OSCommerce knows that the functional code and the html code are all mixed up together.
So now, a couple weeks later our designer has returned and we want to incorporate his changes without destroying all the lovely bug fixes we did. The project is managed with an SVN repository. We did not create a branch for him to work on so this will be his first commit.
I'm wondering how to handle this merge. It's not something I ever really do. Any advice would be much appreciated.