Can't you use SFS2? I thought that could have files larger than that, not I've actually got any files that size myself, but..

BTW writing this on MacOS X on a G4 1.42 with 512 MB of ram, it's like crawling through treacle, nice OS, but soooo slow.. Well compared to Morphos (and other Amiga like OS I could mention, but wont at this moment in time.)