Officially, Home and Pro are identical with respect to WMP.
"Windows Media Player works identically in Windows XP Home Edition and
Professional."
-from Windows XP Inside Out
They also have this to say about MP3 ripping. Sounds like the desktop may
have 3rd party MP3
ripping software if my book is not lying:
What Happened to MP3?
Windows Media Player, as shipped with Windows XP, does not allow you to
create MP3
files from CD audio tracks. It does, however, play any MP3 files that you
might have or
obtain, without sacrificing fidelity, and it does support the addition of
MP3 encoders from
third parties.
The WMA format supported by Windows Media Player achieves audio quality
equivalent to
that of MP3 at much higher compression. A CD track encoded via WMA generally
uses no
more than half the disk space of an MP3 file of comparable quality. (In some
cases, the
size of the WMA file is closer to one third the size of the equivalent MP3.)
If you want to rip files from a CD and save them in MP3 format, you can use
one of many
third-party programs that excel at this task. We recommend downloading one
of these three
inexpensive third-party plug-ins that allow you to create MP3 files at bit
rates of up to 320
Kbps: MP3 PowerEncoder from Cyberlink Corporation; MP3 XPack from
InterVideo, Inc.; or
CinePlayer MP3 Creation Pack from Sonic Solutions. Conveniently, a link in
Windows Media
Player takes you to a Web page with direct links to these and other add-ins:
Choose Tools,
Options. On the Rip Music tab, click Learn More About MP3 Formats.