Hi rousseau,

As Vista™ is still in its 'beta' stages, and Microsoft® have set very strict gudelines regarding its installation; in my honest opinion, NO it will not let you install it on an external Drive.
This is because of the EULA that Vista™ has with regards to installation.
So, its on an 'internal' or not...sorry.

 

You can install Linux on a external drive. In fact you can install linux on a CD ROM and run the OS off the CD.

 

Thnx. I'll probably look at installing Linux to a the external. (I already have a CD boot, but it's not sufficient for me. :grin:

 

DSL on a flash drive is the most awsome thing ever. especially if its a 1 gig flash drive u can have so much on there with linux its awsome.

just plug it in and boot linux or u can run an embedded linux. its just for quick stuff though not the real linux u get with like suse or redhat