I haven't seen any forums with specific instruction on this, particularly using recent versions of the NBI (0.8.4 - 5).
I have a SL install USB with an old version of the NBI (0.8.3 I think)
I would like to do this the best way, and from scratch (completely clean install). I assume that the steps are as follows (with my questions inserted):
1) enable USB legacy, boot to SL install USB stick
2) select disk utility, partition the drive
***how big should I make the Ubuntu partition, and what format? MS-DOS?***
3) go back to the SL installation, direct the SL install to the OsX extended (journaled) partition, let it do its thing
4) upgrade NBI, restart, take off USB legacy support
5) use the downloaded, combined OsX update (10.6.5 or whatever) and update that
6) restart and see if all is good
7) Now install Ubuntu to the other partition
p.s. I have seen a few forums that I can't understand. e.g. I don't know what a grub is (other than the name for a beetle larva). A link to clear instructions would be very appreciated!