My install script allows every pci-id possible to install the driver, a few posts later in the thread you will read how to use it. When the pci-id is allowed you can install it. Usually the driver is generic, only the control file is wrong for the card. I would just try it.
I believe you're looking for 2.6.36 compatibility patches, sema_init.patch, fglrx-2.6.36.patch and makefile_compat.patch google with fglrx and you will find.
Use the ati installer option --extract (or something like that) to patch the relevant parts and after patching use ./ati-installer.sh 8.801 with or without a distro argument (supplying distro allows it to build a native package, otherwise it will just install to the system directly).