posted by Mishan on Sapphire Support Forum;
'Run the installer, and continue until you extract the driver into a folder under C:\ATI\SUPPORT\. At the next opportunity, cancel the installation and navigate to the C:\ATI\SUPPORT\ folder in Windows Explorer. Edit the files as follows, and you can then run C:\ATI\SUPPORT\{CurrentVersion}\Driver\setup.exe.
These first three the CA_XXXXX.ini - look for [WINXP64] / or the CX_XXXXX.ini - look for [WINXP] and the INSTALL.ini modify both. the [WINXP64] and [WINXP]
Add the bold set of numbers 0x94C4,0x94C6,0x9586,0x9587 to end of the first R6 line after Label=
For egzample:
CA_53101.ini (you could have the other number besides the 53101)
R6=DriverPath_R6,0x554F:0x149218BC,0x7162:0x300114 7B,0x4173:0x30011043,0x4E71,0x712A,0x7163,0x4153:0 x3000174B,0x7142:0x30001787,0x5569:0x15481787,0x41 73:0x30011462,0x71A3:0x300117EE,0x4153:0x30001092, 0x5B63:0x30001092,0x94C4,0x94C6,0x9586,0x9587
CX_53101.ini
R6=DriverPath_R6,0x554F:0x149218BC,0x7162:0x300114 7B,0x4173:0x30011043,0x4E71,0x712A,0x7163,0x4153:0 x3000174B,0x7142:0x30001787,0x5569:0x15481787,0x41 73:0x30011462,0x71A3:0x300117EE,0x4153:0x30001092, 0x5B63:0x30001092,0x94C4,0x94C6,0x9586,0x9587
INSTALL.ini
R6=DriverPath_R6,0x554F:0x149218BC,0x7162:0x300114 7B,0x4173:0x30011043,0x4E71,0x712A,0x7163,0x4153:0 x3000174B,0x7142:0x30001787,0x5569:0x15481787,0x41 73:0x30011462,0x71A3:0x300117EE,0x4153:0x30001092, 0x5B63:0x30001092,0x94C4,0x94C6,0x9586,0x9587
Under the Driver directory is the XP_INF dir. in this one you modify:
CX_53101.inf
First search for HD 2600 (or whatever your model is) ; that will get you to the area to add the following:
"ATI Radeon HD 2400 PRO AGP" = ati2mtag_RV610, PCI\VEN_1002&DEV_94C4
"ATI Radeon HD 2400 XT AGP" = ati2mtag_RV610, PCI\VEN_1002&DEV_94C6
"ATI Radeon HD 2600 PRO AGP" = ati2mtag_RV630, PCI\VEN_1002&DEV_9587
"ATI Radeon HD 2600 XT AGP" = ati2mtag_RV630, PCI\VEN_1002&DEV_9586
Now run the installer
Worked fine for me
'