How can I uninstall Quicktime to install an earlier version?

I am using Adobe Premiere on 10.3.9 and I have had a ton of problems each time I upgrade anything, including Quicktime - Apparently, the optimum version of quicktime to run Premiere is 6.5.2 - -
I have trashed everything that says quicktime from every drive, but still, when I go to install quicktime 6.5.2 the installer will not let me choose my start up disk because it says there is a newer version already on it... What am I missing here? Am I going to have to erase the entire disk and re-install every bit of software?
Help, please!

None of the uninstallers worked. I would always get messages saying that I had a newer version of quicktime installed no matter what I did. I dragged everything I could find on the drive (on every volume in the computer) to the trash and dumped it all - got the same message -= I finally just backed up all my files and erased the disk and reinstalled the entire operating system starting with OS 9 . - that was the only thing that worked for me.

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How can I uninstall Quicktime to install an earlier version?

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