Hi Dreamcube017 - yup like Pilou says you want to use the Edit > Trim command for that kind of surface-level cutting. It will slice only the surface of your object up into pieces instead of working at a solid volume level like the booleans are targeted at.

See here for a previous example similar to what you are describing and some description on how to use Trim:
http://moi3d.com/forum/index.php?webtag=MOI&msg=4791.13

- Michael