upgrade from hard drive?

[Beartooth]

	I *think* it's possible to upgrade from a .iso on the hard drive 
-- right? How?

	I managed to upgrade FC5 to FC6, because I have CDs for that; but 
I want to get clear to F8, and the machine I'm trying to upgrade has only 
a CD drive. 

	If I plug in my external USB DVD drive, it's a big fight to get 
it to acknowledge that drive exists; it refuses utterly to boot from it, 
despite anything I do in the BIOS.

	So last night I copied the DVD onto the hard drive. It is at /
root/_FU_20070912_7_i386_DVD_.iso -- as the copying function said, and as 
nautilus duly displays.

	Do I try to open it with FC6's anaconda? 

	Get it to display the contents of the .iso and open the anaconda 
there? (I imagine that must be what it does if I upgrade a machine that 
can boot from DVD.)

	Or is there some strange madman's magic that I wot naught of?

-- 
Beartooth Staffwright, PhD, Neo-Redneck Linux Convert
Fedora 8 & 9; Alpine 1.10, Pan 0.132; Privoxy 3.0.6;
Dillo 0.8.6, Galeon 2.0.3, Epiphany 2.20, Opera 9.27, Firefox 2.0
Remember I know precious little of what I am talking about.