I believe you already have the most common answer, you’ll need custom Comskip INI. You can check this page for come custom INI’s developed by the community or the Comskip forum for more community developed INI’s. Tuning Comskip and Custom Comskip INI's (Country / Channel specific)
Other options include:
- Develop you own custom INI using the Comskip INI GUI tool included with Comskip
- Use MCEBuddy Custom Cuts to manually mark the commercials to cut
- Use ShowAnalyzer included with MCEBuddy instead of Comskip to detect commercials. Some folks find better success with ShowAnalyzer compared to Comskip for some channels. It also has a built in GUI tool to adjust the commercial detection algorithm