ethel
virtual PC is excellent
just try to keep track of where you are ...
it's virtual ... but it's real ... or at least it seems like it is (except you do CTrl+Alt+Del from the menu!)
If you are downloading ubuntu as an iso (personally I'd try knoppix
http://www.knoppix.org/ .... it comes with all the software loaded .. so you can start easy and get used to the software before you "go solo" with a real system setup).
Whichever way you decide to go ... VPC will mount an ISO image as if it were a real cd (and it will be much faster than a real cd).
ms keep changing the default settings ... so the boot from CD may or may nort work at first ...
create the machine then in the usual way access the bios (del) and set boot order in the usual way.
also remember to remember who is using what drive ... it's virtual ... but you need to capture drives, network adapters etc before they will work - and they won't work with the PC while they are captured.
finally ... you can test a bootable disc without loading an operating system ... just create a virtual machine ... and leave it at that.
the eee pc is absolutely brill ... it took three of them to get it back off me! ....
it works with linux ... but it's pretty seamless