This is what I did:
"""Removing Old ATI Software
Click on Start, then Control Panel, then go to Add/Remove Programs.
At the top of the list you should see several ATI entries. Select the entry entitled ATI Software Uninstall Utility, and click Change/Remove.
You will be PROMPTED to restart your system once the uninstall is complete.
Once restarted, check the Add/Remove Programs list again for any remaining ATI software.
If any ATI software is still listed, click Change/Remove on those entries to uninstall each one individually.
Next, please SCROLL through the list until you find an entry called DAO (see screenshot below).
Select DAO, then Click Change/Remove to uninstall this program.
If you do not have the ATI Software Uninstall Utility listed in the add or remove programs list, you can simply uninstall each listed ATI component by clicking on it, then clicking on the Change/Remove button. """

And then I installed the RadeonX300 and attempted to run it, but it now told me that I need to install Directx8 first.


Everest says you have directx9.0c installed, re run Everest & check it.
Use msconfig to confirm this.

When you downloaded the X300 drivers what type of file did you get, was it an exe file?FieldValue
Computer
Operating SystemMicrosoft Windows XP Media Center Edition
OS Service PackService Pack 2
DirectX4.09.00.0904 (DirectX 9.0c)
Computer NameDF5FDS81
User NameMario Casarez

Motherboard
CPU TypeIntel Pentium 4, 3200 MHz
Motherboard NameDell Dell DXP051
Motherboard ChipsetIntel Lakeport i945G/P
System Memory512 MB
BIOS TypePhoenix (09/01/05)
Communication PortRIM Virtual Serial Port v2 (COM4)
Communication PortRIM Virtual Serial Port v2 (COM5)

Display
Video AdapterATI Radeon X300 (RV370)
3D AcceleratorATI Radeon X300 (RV370)

Multimedia
Audio AdapterIntel 82801GB ICH7 - High Definition Audio Controller [A-1]

Storage
IDE ControllerIntel(R) 82801G (ICH7 Family) Ultra ATA Storage Controllers - 27DF
IDE ControllerIntel(R) 82801GR/GH SATA AHCI Controller
Disk DriveST380013AS (80 GB, 7200 RPM, SATA)
Disk DriveSeagate FreeAgentDesktop USB Device (698 GB, USB)
OPTICAL DriveSONY CD-RW CRX217E
Optical DriveSONY DVD-ROM DDU1615 (16x/48x DVD-ROM)
SMART Hard Disks StatusOK

Partitions
C: (NTFS)71468 MB (42582 MB free)
F: (NTFS)715402 MB (609655 MB free)
Total Size768.4 GB (637.0 GB free)

Input
KeyboardHID Keyboard Device
MouseHID-compliant mouse

Network
Network AdapterIntel(R) PRO/1000 PL Network Connection (192.168.1.64)
ModemConexant D850 56K V.9x DFVc Modem
ModemStandard Modem

Peripherals
USB1 ControllerIntel 82801GB ICH7 - USB Universal Host Controller [A-1]
USB1 ControllerIntel 82801GB ICH7 - USB Universal Host Controller [A-1]
USB1 ControllerIntel 82801GB ICH7 - USB Universal Host Controller [A-1]
USB1 ControllerIntel 82801GB ICH7 - USB Universal Host Controller [A-1]
USB2 ControllerIntel 82801GB ICH7 - Enhanced USB2 Controller [A-1]
USB DeviceCanon MP160
USB DeviceGeneric USB Hub
USB DeviceUSB Composite Device
USB DeviceUSB Human Interface Device
USB DeviceUSB Human Interface Device
USB DeviceUSB Mass Storage Device
USB DeviceUSB Printing Support



I did get an exe file when I downloaded the x300 drivers.By the way, I downloaded the Catalyst Drivers from the Radeon site. Were those the ones I needed to download?Yes Catalyst drivers sound like the right ones, did you download
8-7_xp32_dd_65993.exe to your computer then double click on it?Yes I downloaded the catalyst drivers and double clicked on it. I also "ran" it and I got the same error message that I needed Directx 8 installed.

I don't believe you can remove or even roll back directx but it wouldn't hurt to reinstall directx9.0c. Did msconfig report it as 9.0c too?
Do you have any of the original software for that computer, perhaps that will be of some use.unfortunately I dont have any of the original software for this computer. Where in msconfig do I check to see if it reports it as 9.0c too?Does anyone know if i can install any other drivers besides Radeon x300 to correct this? The x300 requires that I have Directx 8 installed and I can't find it anywhere!Oops, I meant to say dxdiag, sorry about that.
I think dxdiag will report the same as Everest.
You could TRY contacting Dell and Radeon, maybe they can help.