Before posing this question I did in fact convert my disks to dynamic, of course, because only through dynamic disks can you have software raid.
However the link you've provided doesn't support your view that software RAID is possible on Windows XP based on what I see...
Even some of the posts reinforce the fact that XP Does Not support Raid 1 or 5
For example:
"I've followed these directions numerous times and I've never had any options except Simple Volume. The others are always grayed out. And the following is from the Disk Management Help files in XP:
You can create mirrored volumes only on computers running Windows 2000 Server, Windows 2000 Advanced Server, or Windows 2000 Datacenter Server."
and
"without an adapter card, Windows 2000/XP do not feature any redundancy arrays for their harddisks. Only Windows 2000 Server/Adv. Server/Datacenter, and Windows 2003 Server and up feature redundancy through software.
It is possible, however, to have redundancy through adapter cards as mentioned before."
I appreciate your help.