Applications :: Looking For Freeware Defrag For Mac OSX?

im looking for a Freeware Bootable Defrag App for Mac OSX 10.6

i know you's are going to say "macs dont need to be defragged" but they do

reason being when you use a mac for around a year or so and seriously load up your hard drive it generates files which cannot be moved. (files over 20mb's) why do i need to move them?

when you are creating a boot camp partition it needs to move files away from the partitioning part of your drive but some files cannot be moved without a full defrag and nothing including repairing the disc or repairing permissions can fix it to move those files even if you boot of the cd.

the only 2 things that can fix it is 1: a defrag or 2: a format

so! anyone know of a freeware bootable defrag for osx because im not up for a format.