You could try the Open University Certificate in Accounting. A tough course, but definitely worth the effort. You may still be in time to register for 2007-08
Irishtraining.ie is also a good way of looking for a course, i did a diploma in office skills with them through distance learning and they are also quite reasonable with their fees
I did an IATI course in cit, a 2 year course in the evenings, the courses are really just starting and if you contact the college they would still let you join. you could check out for info