Here is a note on Debian installs from USB. I don't know if the Acid release is
"isohybrid" though. I suppose if your system can boot from a USB stick it would work. There are probably others that have done it????

A.2.2. USB memory stick

It's also possible to install from removable USB storage devices. For example a USB keychain can make a handy Debian install medium that you can take with you anywhere.
The easiest way to prepare your USB memory stick is to download any Debian CD or DVD image that will fit on it, and write the CD image directly to the memory stick. Of course this will destroy anything already on the memory stick. This works because Debian CD images are "isohybrid" images that can boot both from CD and from USB drives.
There are other, more flexible ways to set up a memory stick to use the debian-installer, and it's possible to get it to work with smaller memory sticks. For details, see Section 4.3, “Preparing Files for USB Memory Stick Booting”.
Some BIOSes can boot USB storage directly, and some cannot. You may need to configure your BIOS to boot from a “removable drive” or even a “USB-ZIP” to get it to boot from the USB device. For helpful hints and details, see Section 5.1.5, “Booting from USB Memory Stick”.


73 Doug
WA3DSP
http://www.crompton.com/hamradio