What I want to do is dual boot Mac OS X and Linux on my MacBook and have access to files on both systems with no problems (if that's even possible). I have already got dual boot but I cannot write/access certain files on my MacBook drive (not to mention any HFS+ drives) and I cannot even mount the Linux boot drive while on Mac OS X, just doesn't show up anywhere.
I think I have already read about this somewhere, though I can't remember exactly where. Was something to do with switching usertype or something along those lines on MacOSX.