Interim staff won't need to pay too mucht attention to office politics or cope with liabilities. Especially in a cross-functional setting, an external expert can prove extremely efficient as problem solver.
With an extra project on your agenda, stress is likely to be the result.
Free your timetable from unnecessary tasks:
Ask an interim project coordinator to make sure your partners have got alle the information they need. It's also important to make sure that third parties know and respect style guidelines and brand imperatives.
For project planning at the interface between marketing and IT department as well as tracking and reporting - the decision to get interim support will make life easier.