Can't Install Logic 8

Question

I've decided that it's time for me to leave OS9 behind and start making music in OSX. I bought a Logic 8 as it's now super cheap and at the weekend tried to install it on my Mac.
My MDD 1.25 G4 is right at the bottom end of the minimum system requirements but it's on there. So I poped in the first DVD and double clicked the installer. And up popped a message saying that my video card didn't meet the recommended system requirements. However it turns out that recommeded system requirements really means minimum system requirements as the installer doesn't allow me to proceed any further and quits.
Checking these forums reveals that my problem is that I have replaced the stock AGP graphics card (Radeon 9000) that came with the Mac with the superior Radeon 9200 PCI card which gives me much better performance with my dual monitor set up. However OSX doesn't support Quartz Extreme via PCI (which is the sticking point for the Logic installer). There was a hack available to get around this but its broken for 10.4.3 and above and Logic requires 10.4.9.
What I am not happy about is firstly that the dialogue box is misleading - surely it should say that my card doesn't meet the MINIMUM requirement - after all if it won't run without a Quartz Extreme then that to me is a minimum requirement. Recommended implies that it will run, I might just be missing out on some eye candy and graphics performance may be compromised in places, which I could probably live with.
However there is also no mention of this requirement on either the box for Logic 8 or on the system requirements on the Logic 8 page here, and although I probably wouldn't have realised that my choice of graphics cards would be a problem before trying to install, it would have made troubleshooting easier.
Also while I realise that I have configured my Mac in a non-standard way, however, the problem in my case isn't the absence of the AGP graphics card, but the presence of the PCI one. Logic is one one those programs that greatly benefits from multiple monitor set-ups. It was the app that convinced me of the benefits of a dual monitor set up and one that could easily make use of at least 3 monitors. However this of course requires the use of PCI cards to get support for more than 2 monitors.
Not at all happy...

Answer 1

Well I've had some success with the installer by swapping out the Radeon 9200 PCI card for another AGP Graphics card I borrowed from a MDD G4 at work.
I got EXACTLY the same message about the graphics card not meeting the recommended specifications as before except this time the button at the bottom of the dialogue said "Continue" instead of "Close" as it had previously...
Proceeding with the installer I decided to install everything while I could and remove any components I didn't need later. However about half way through the 4th DVD (Content 3) the Mac froze solid and I could only get out of this by powering down from the front panel button. This is a problem I'd been having but one that appeared to have been cured by removing the original AGP card and just using the PCI graphics card.
I tried launching Logic and it looks OK but the interface has changed so much since v4 (which is what I've been using up to now) that I was pretty much lost for the moment. Hopefully it'll all still work when I've swapped the graphics cards back.
So can anyone tell me what I've missed out on from a complete install? The application and Content 1 and 2 DVDs all completed. Can I just run the content 3 DVD on its own? - it took well over an hour to reach the point where the Mac froze on me, and less of this I have to repeat the better.
Thanks