well, im not sure what you mean by "2.6.6 driver".. but here's what I did to get it all working, and i must say, my system is running better than ever

...
1. download the 2.6.6 kernel source from
www.kernel.org --
su
[enter pass]
cd /usr/src
wget
http://www.kernel.org/pub/linux/kern...-2.6.6.tar.bz2
2. decompress the kernel source tree --
bzip2 -cd linux-2.6.6.tar.bz2 | tar xf -
3. grab a fc2 config.. you can use the one in /boot --
cd linux-2.6.6/
cp /boot/config-2.6.5-1.358 .config
4. normal kernel compilation process --
make menuconfig
(in here, i chose to use 4k stacks under the KERNEL HACKING section.
this is a new feature in 2.6.6 that fc2 'patches' for, but its not in the menuconfig
for 2.6.5.)
vi Makefile
(i add some stuff to the EXTRA VERSION line, line 4. you dont have to.)
make all && make modules_install && make install
5. reboot, and be sure to select the new (top) kernel. you can change the default in /etc/grub.conf.
6. be sure everything starts ok (no kernel panics :P). it should.
7. ATI driver time. If you've attempted to install the 3.7.6 (latest) fglrx rpm before, remove it --
su
[enter pass]
rpm -e fglrx
8. Install the fglrx rpm like normal --
rpm -ivh --replacefiles /path/to/fglrx-4.3.0-3.7.6.i386.rpm
9. it should say "failed to find precompiled kernel module for your kernel", which is fine. It should then run the make.sh and attempt to build the module, and it should succeed. You should not see any "failed, go to /lib/modules/fglrx/build_mod blah blah". It should install ok.
10. Verify it really did make the module ok by modprobing it youself --
/sbin/modprobe fglrx
no errors should occur, it should just go to the next line in the terminal. if errors occured, check dmesg... but you're gonna need more help than this little guide provides hehehe
11. do all the xorg.conf editing (at the least, change the driver from 'radeon' to 'fglrx'. )
That's basically what i did. all is well with 2.6.6, im very very happy with its performance & stability

Yes, i am using the latest ati fglrx driver, 3.7.6. thanks for everyones help!!!
-smthmlk