How to downgrade a new iMac (model 12.1) to SnowL

Hi I just got a new iMac with the latest version of Lion but I want it to run under SL, since many of my prgrams won't work on Lion.
I got the original SL instalation disc as well as a Time Machine Backup HD (with Leopard from my old iMac).
Regards

Your new iMac may not be able to boot into Snow Leopard. Although the currently-shipping models were first released with Snow Leopard, and so one might assume that they can boot into Snow Leopard, those being sold now might have received minor changes to their hardware or firmware which prevent Snow Leopard from fully functioning or booting these machines at all.
I know that I've had mixed success with recently-purchased iMacs and Snow Leopard. So I suggest that you do not remove the Lion installation, but instead use an external hard drive or a partition of the internal hard drive for any attempt to install Snow Leopard.
If you have a "full retail" Snow Leopard installation DVD, just pop it into your iMac's optical drive (after formatting the external drive/partitioning the internal drive using Disk Utility, of course), restart while holding the C key on your keyboard, and be sure to choose the external drive/correct internal drive partition on which you want to try installing Snow Leopard.

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http://support.apple.com/kb/HT2186
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<hr width="200">
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Click image to go to correct forum.
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How to downgrade a new iMac (model 12.1) to SnowL

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