Thank you very much, Roy. It is very helpful. Now the SL runnig well on my mid 2011 mini server!
Steps:
1. Backup your 10.6.8 with the time machine using a portable HD.
2. Insert a bootable 10.6 version DVD in your other Mac computer. Plug your time machine HD to your othe Mac.Connect your mini and other Mac with a firewire 800 cable. Then set the mini as the Target Disk Mode. Restart mini.
3. Start your other Mac, Press option when the bell sounds.
4. Select the 10.6DVD
5.Waiting until the languages selection appears, choose your language.
6.After you get into the installer, just select Recovered from Time Machine. You should choose the correct mini HD, the yellow colored with a sign of firewire.
7.RECOVERY is in process. As for me, 200GB files took me 2.5 hrs to recover.
8.After the recovery completed, restart your other Mac, press option and select the disk which contains the recovered system. And boot.
9. Copy the necessary kexts and plists files to the desktop which introduced by David Amis in page 27. And follow the steps introduced to add & replace files.
10. Then, a NFG kexts is necessary to insure your best performance on a mini server i7 2.0Ghz qual-core.
11. Enjoy it!
By the way, I connect my Dell U2412m to the HDMI port and it works perfect!