Formatting a lacie hard drive to work on a Mac and Pc

I'm trying to get a lacie hard drive to run with both a Mac and PC. I'm formatting the drive using FAT32 on the PC but it's limiting me to 32Gb partitions. I do have another Maxtor drive with a 111Gb Fat32 partition and the Mac allows me to read and write to it, so I know it's possible. Any ideas how to format the drive with just one large partition. Thanks

G4 Powerbook Mac OS X (10.4.5)