I have an Asus A7V133 motherboard which I am trying to setup Raid0 and install XP I have the following parameters:

A7V133 Rev 1.04. Bios 1.09
Onboard Promise Chip PDC20265R Fastrak 1.31 build 22
2000MHz+ Athlon XP
500Mb Ram
2 off 80Gb WD 8mb buffer IDE HDD's
Latest XP motherboard drivers
Raid disk partitioned 20Gb/140GB Fat32 (desktop)-functional

Both Win98 (loaded on 3rd removable HDD ide66) and Dos see my raid partitions and function correctly. XP when loading and installing requested manufacturers Raid driver disk refuses to recognise raid partitions. I installed XP on removable HDD IDE66 and XP refuses to load Raid drivers manually, question mark present on Raid device in system tree.

I believe that Asus had upgraded the promise chip to support raid 0 & 1, mine only supports Raid 0, is my revision

It was hard to decipher from your post but did you press F6 when prompted at the beginning of your XP install and load your drivers from a floppy? This is the only way to load raid drivers with XP and it has to be done during installation. If you did and it failed, check your driver disk and make sure there is a file called "txtsetup.oem". XP requires this file in order to recognize your drivers. Also, make sure your drivers are WHQL certified. I had the same chip on a MSI motherboard and had problems loading drivers that were not digitally signed. And they don't necessarily need to be Asus drivers either, any will do as long as they are for the same chip. You can always go back and install different drivers once they are recognized and loaded for the first time. Good Luck!