<human>: Okay... 

I'm starting the process of training up for my first full marathon.  I've run two 1/2 marathons already (Akron (Sept 2010) & Flying Pig (May 2011)).  I've run them right at the 2 hour mark... 2h6m40s and 2h3m52s.  

In my training schedules I have from time to run listened when my body wanted to run... sometimes running 4 or 5 times a week.  I have always kept my long runs and tempo runs intact but have occasionally broken my shorter runs into separate runs to satisfy the desire to run even when it wasn't on the schedule.  

Now, however, my training schedule (downloaded from the Smart Coach option on Runner's World page... whom I've used both for maintenance and for training for my 1/2s) has me strictly running only three times a week.  

My question is: I'm feeling like I want to run occasionally more than three times a week.  Will it hurt my overall training if I take some of the shorter, easy runs and break them onto separate days to satisfy the desire to run or should I be focusing on running on less days but logging more mileage when I run?  (I'm not talking about all about splitting up my long runs or tempo/speed workouts... just some of the shorter easy 4-8 mile runs into two 3-4 mile runs...)

Those of you who have trained up for the full marathon and completed it... what say you as you have experienced in your training?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: In training for a full marathon, is total mileage trained per week more or less important than the length of the individual runs?