Thanks to Mark and ChiefZeke; I had seen the earlier post, Mark, that you mentioned prior to doing my post, so thanks for pointing that out. ChiefZeke's suggestion looks like a good idea and I may pursue that. The I/O Flex is a strange card, but it was quickly available and I went for it. I do have the docs and they say nothing about the controller being bootable, so you may be correct Mark.
I also noted, in the closed post, a link to download a better driver for the SATA controller; so, I d/l it and copied the files to a floppy disk. I then began a clean install of XP and pressed the "F6" option and inserted the floppy. XP recognized and seemed to accept the SATA controller. However, during the install the XP install program once again required the floppy, but this time gave me the error that the "disk or CD may be damaged". So, I copied the files to another floppy but am still getting the error.
I then restarted the XP clean install, once again pressed the "F6" key and inserted the same disk that worked earlier; this time, though, I got the same "damaged" error; so right now I'm dead in the water. Sadly, it looks as if this is the solution that may have worked.
As I mentioned, I will probably pursue ChiefZeke's suggestion and purchase a better and (hopefully) bootable SATA controller.
On another topic: are any of you familiar with this so-called "interrupt 19 (INT19)" option which supposedly, if enabled, allows the BIOS to "capture" the controller?
Thanks again.