XP Upgrade problem

I tried to upgrade my computer's OS to XP Professional from XP Home and it
would not let me do an upgrade only a new installation. Here is the
background. I puchased a new computer which came with XP Home preinstalled
with drivers and a variety of applications (some of which I wanted). It is
an HP AMD computer system. I have run Partition Magic to change the
partitioning (get way from one very large partition to several), and I
installed Susie Linex (to learn about it) in one of the partitions. It now
has a boot option that allows me to boot either XP Home or Linix. It works
fine.

I then purchased a copy of XP Professional upgrade, wanting to upgrade my
computer. Before starting this, I did run Ghost and made an image of my C
partition. I ran the upgrade and it would not let me do an upgrade, only a
new installation. It did not ask me the question "Do I want to do an
upgrade". Anyway I thought that I might proceed with the installation
thinking that I miss understood the documentation and I would get the
upgrade question a little later in the process. I was wrong and it did a
full installation. I lost all of my applications (Office, etc.) that I
installed including the ones that came pre-installed (that is why I wanted
to do the upgrade and not a new installation).

Well anyway, I put the Ghost backup in and ran it to return my computer to
how it was before. That all seems to work (applications, etc.) except I
can't seem to get out my DSL line and I don't know why. I don't
particularly want to worry about that now. I would just like to figure out
what I have to do to do an upagrade. Then look at the DSL problem.

Any ideas?

Neal