Your SmartDisk hard drive can be formatted and partitioned using Apple’s Disk Utility, located in your Utilities folder. Under Disk and Volumes Selected, select the appropriate drive, and click on the Partition tab. Under Volume Information, expand the Format field and choose Free Space. Click on the Erase tab, expand the Volume Format Field, and click MS-DOS File System. Click Erase and wait for the Erase to complete. Your drive is now ready to be connected to a Windows operating system.
I didn't think this could be done any more under 10.3, but I didn't choose the "Free Space" tab. I need to test this.