Thanx Wardc for trying to help out though it doesn't get me further.
The only way to get a perfect tiger system on the new macs with the 2600xt card is by creating a DMG out of an iMac with Tiger (since it also has a 2600 card) though this is is not officially supported by apple.
I personally need to run Tiger for certain software compatibility so this is why I urgently need to make this DMG before my iMac ships off.
If anyone could answer my 3 question two posts earlier I would be increadibly greatful.
Thanx
From what I understand, you can use an ATI 2600 card in the older Mac Pro line, which WILL support 10.4 (Tiger) -- I believe you can do this without a hitch. However, you will be unable to use an 8800GT in the older Mac Pro because it's PCIe 1.0 and not 2.0, which is the standard for the newer Harpertowns.
What I am guessing is that you already have a 2008 model, with a 2600XT card, and you are wishing to run Tiger on it. There is probably a hack, a workaround...to let you do this...but it would take some hacking, possibly taking a 10.4.x installer disk and tweaking the installer to let you do this, or possibly fooling your firmware into thinking you have an older series Mac Pro. The installer basically checks your firmware, which shows the version (of Mac Pro) firmware that is running on the ROMs in your box. The firmware IS hackable...IS tweakable...but any such exercise would definately void your warranty and is not recommended by me nor anyone. Just telling you -- it's possible to do it, if you have the know-how, but I don't know anybody who's tried it.
Maybe you could use a program like VMWare or Parallels to run a "virtual" system of Tiger on your box. That may be possible, I have no info on this, nor do I know if anybody's done it...but theoretically it could work. May take some hacking, as well.
Again...I DO believe you can run a 2600XT card on the older Mac Pros, which will run Tiger (that's the system they come with). Wait, YES they do...just found this. You can run a 2600XT on an older-gen Mac Pro -- AND run Tiger!!
From Apple Store Reviews:
"Just swapped this one in replacement of my sick x1900. While the card is half the size, half the noise, half the RAM -- it does work! No more blue lines, or other screen issues (i.e. system freezing). This one does the job, and I appreciate the low heat emissions as well (my legs were perspiring under the desk. Forget the x1900, get this card.
And FYI it works on Mac Pros that do not have the newer PCI slot."
Check it, here:
http://store.apple.com/1-800-MY-APP...op_mac/mac_accessories/displays&nplm=MB198Z/A
Again, good luck with Tiger on a Harpertown. It may be a bit of a struggle or long road to get it to work, or you may have no luck at all. But you can run Tiger and the 2600XT on the old Mac Pro.
-Ward