You have to do the .inf fix before installation to get the refresh rate fix to function.
Like I said in your other thread, replacing a proper INF file with someone elses is not my idea of a wise choice and it's not something I want to do unless I have no other choice. I'll just wait for Riva Tuner 2.0 RC11 instead.
Besides, according to my test results with the 2751s there is no reason for me to give up the 2312s just yet.