|If you have ntfs you usually can not easily just convert. You have to copy off data.|
Vista should have a way to re-size a partition. You may be able to move a bit at a time or all of it from a shrunken ntfs to a newly created fat.
NTFS-3G support is added for MacOSX.
Consider adding support for ntfs in apple.
Go to this link
That way you get the benefit of ntfs and can swap between.
1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.