Hi Emmet,
Beware: with the recession, training budgets have shrunk to almost nothing and there is no shortage of ECDL Trainers. It may not be the most attractive career choice right now.
Contact ICS Skills (they are behind ECDL) about getting certified. They will tell you about their Train the Trainer programme, which will officially allow you to train people but also to administer tests.
There are a few recognised Train the Trainer programmes. If you take Microsoft Office Specialist exams, your scope will be slightly different, you will have MOS certification which with a Train the Trainer course makes you a Microsoft Certified Trainer.
Finally, the broader scope of JEB will prepare you for any type of IT training and is highly valued in the marketplace. That's the road I followed.
Send me a private message if you want and I will be happy to explain this further or send you my phone number.