Hi there doctortobee,
I went through the application process last year and worried needlessly about the personal statement. They give you so little room because most D.O. secondaries ask you to provide such a substantial secondary application. I am going to be a first year student at MSUCOM in the fall and their secondary app was the most lengthy and detailed app ever. I believe that the schools realize that there is more to you than what you can say in so many words.
Just make sure that you address an experience or a reason why you want to practice osteopathy and what you know about the profession (i.e. how it fits into your belief system). Have people proofread and be prepared to edit, edit, edit. There isn't a lot of room as I'm sure you already know.
Best of luck with everything and if you have any more questions, feel free to email. You'll be glad once everything is said and done!
Julia
MSUCOM Class of 2006