Sorry PF I'll try & be more constructive. You need to get in touch with the organzation that covers most of the international marathons so you can select which marathons to do, sorry I don't know the name of the organization but I believe one of the RW contributors, Hugh Jones, is on the comitee. Maybe you could e-mail him at RW.
Best of luck & let us know how you get on,
All the best,
PM