[Andreas]

To convert manually modified templates to TMS:

1) Find out a single change in the affected template
2) In Template Modifications Manager select 'Add Template-Modification' from the MASTER style dropdown
3) Select the Template, enter a descriptive title (eg. Add link to Chat), a varname, search and replace text
4) Hit save

Repeat these steps as necessary.
Once you've done with all modifications, create a new style with no parent style.
Test the modifications. If they all pass, select the style in frontend and check if it does what it should do.
If so, you can revert the template.