Problem with loading XP from external DVD/CD drive

[Gordon]

I really don't know where to go with this, so I thought someone on here
might be able to help.
I have a Netbook (Toshiba NB100) that has no optical drive. I have a
Liteon external USB DVD/CD RW drive.
I am trying to install XP on the Netbook.
The netbook consistently refuses to boot from the XP CD. It either just
flips into the current OS (Ubuntu) or gives the dreaded "Can't find
NTLDR" error.
And yet - it will boot from an Ubuntu Live CD disk perfectly well, AND
if I plug
this external drive into my Windows 7 machine, (another Toshiba
Satellite laptop) that machine will boot quite properly from the XP CD
in the same external drive!!!!
Can anyone cast any light on what on earth is going on?

 

[Iceman]

I really don't know where to go with this, so I thought someone on here
might be able to help.
I have a Netbook (Toshiba NB100) that has no optical drive. I have a
Liteon external USB DVD/CD RW drive.
I am trying to install XP on the Netbook.
The netbook consistently refuses to boot from the XP CD. It either just
flips into the current OS (Ubuntu) or gives the dreaded "Can't find
NTLDR" error.
And yet - it will boot from an Ubuntu Live CD disk perfectly well, AND
if I plug
this external drive into my Windows 7 machine, (another Toshiba
Satellite laptop) that machine will boot quite properly from the XP CD
in the same external drive!!!!
Can anyone cast any light on what on earth is going on?

See this page for solutions for the NTDLR error:

http://pcsupport.about.com/od/findbyerrormessage/a/ntldrmissingxp.htm

Shorter link: http://tinyurl.com/2zfdhq