Custom HIM plan w/ HM race one month out.

So I am doing my first HIM in June and trying to set up a training plan for that which will start next week. I will also be running a HM 4 weeks prior to the HIM and want to know how I will incorporate that into my current plan.  Do I just need to adjust it so that the week before the HM is a recovery week to allow for some taper?  YES, THIS IS A SIMPLE WAY.  I ASSUME YOU ARE USING THE HIM RUNNING PART OF THE PLAN FOR THE HM?  OR YOUR OWN HM PLAN? Is there a better way to incorporate that into the custom plan?

Also, I have done 2 olympic races the latest being in August of 2012.  I also completed a half marathon late in October and while not consistent on the running I've kept it up since then.  I also have being doing Jorge's winter plan and am in week 11 doing the three shorter workouts.  I have also been doing a masters swimming group 2-3 days a week where I swim 2800-3500 yards as per the planned workout.  If I select  a beginner level, since this is my first him, for the custom plan the numbers and mileage seem extremely low starting out.  Am I better off starting out shorter and building.  Or would I be better off going with an intermediate level plan and would that give me more mileage starting out.   I WOULD DO THE INTERMEDIATE SINCE YOU ALREADY HAVE HM TRAINING AND AM ON A HIGHER-INTENSITY CYCLING PLAN - PLUS THE MASTERS SWIMMING.  It just seems looking at the plan that I would be starting completely over not taking into consideration my current fitness?  YOU ARE CORRECT.  THE BEGINNER PLAN IS MORE 'BEGINNER' TO THAT VOLUME, NOT EXACTLY FOR YOUR FIRST HIM.