IMovie 4 freezing and stuttering

Here's my new thread to my old problem:
Installed new OX 10.3.9 bundled with iMovie 4 and QT 7. iMovie 4 does not work at all, even for simple video projects -- freezes and stutters and impossible to use. Problem is not related to number of audio clips -- adding just one audio clip greatly exacerbates the problem. Have added RAM and have plenty of available GB. Tried changing default H.264 setting within Quicktime (as suggested in QT thread). Still no improvement. It's been suggested that my system is inadequate, although per system reqs, mine should do. It's also been suggested that iMovie 4 and QT 7 are a troubled couple and just don't get along, but have not found a way to downgrade to QT 6. (The downgrader suggested only works for 7.0.1 or something; I have 7.1.3.)
My question now is: can I install a new version of iMovie that has the right version of Quicktime? What about iLife 5, which my system supports, at least for iMovie, which comes with QT 6.5.2? Will it overwrite my newer QT?
I know iMovie 2 is stable, and I could go back to it, but it's such a pain to switch operating systems, and that version is relatively primitive, so I'm really hoping to stabilize my new system. Then, I'll leave it alone!
Thanks for any advice ...

Hi
I think Sue "SDIllini" use to know how and where to find it. Try the search
function in this forum.
My main advice is: Never change anything during a movie project. One never
knows what will happen and what new buggs that are introduced.
I have on my "reliabe" Mac: Mac OS X.3.9 + QT 6.5.2 + iMovie 5.0.2
Yours Bengt W

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Message was edited by: Rich839

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