Portable, Bootable Ubuntu on USB Drive

Hello all,

I need to install Ubuntu to my flash drive so that it is bootable on all computers. As of now, I can get it working on my Windows computer but can not boot Ubuntu on my Mac. I am well aware of how to choose the partition to boot from.

I am unsure if it is possible to do this, as Windows generally uses MBR and Mac uses GUID Partition Table for their partition map scheme. Ideally, I would also like to multiple partitions for other operating systems (Fedora, etc.), and a blank partition for personal data. If this isn't possible and all files must be on one partition, I would like for the Ubuntu system files to be hidden, but I am also unsure of how to do this.

Can someone help me out?

Thanks in advance,

William

I would like to see this also...

The last time I looked the Ubuntu web site had step-by-step instructions for creating a Ubuntu USB boot disk for Mac. However, their reccommendation was to use DVD, and looking at their instructions, I was inclined to agree.

If I can find the link I will post it back in this post.

EDIT: Found it.
http://www.ubuntu.com/download/ubuntu/download