I've searched google but cant find an answer to my question. I have an external HD, partitioned into 2 volumes, where 1 volume is empty and I want to install Tiger onto this volume. Trouble is when I boot into the install CD and try to install on this volume it says that it 'cannot install on this volume.Mac OS cannot boot into this volume.' I found on google that when partitioning the whole ext. HD, there is an option about a GUID or something which allows the drive be bootable. This would be useful but it would wipe my whole drive, including the other volume. I do not want to do a clone of my int. HD, and SuperDuper! it onto the ext. HD. Any suggestions anyone? Thanks for reading, b.