Bets - 2011 challenge

I've got a bet on with Nick for the following times and distances to be achieved before the end of the year :

Race Estimates for JAMES HIGHNAM
5km Time	10km Time	15km Time	Semi Time	Marathon Time
00:18:01	00:37:33	00:58:13	01:23:34	02:56:09

I hadn't looked at these for a while following our exchange back in April and I thought that I'd beaten the 10km time with my race in Les Clayes. Turns out that I missed the objective by 2 seconds so I'll have to keep trying. The objective is to beat 4 of these 5 times by year end and Nick pays for the beers all evening. If I don't manage then it's my shout.

The real difficulty is going to be planning all of these races around the events that are already scheduled. Now where's my race calendar ... ?