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Yesterday I successfully got LION to work on an optiplex 745. Not without issues, but most functions are running now. I have the Ultra Small Form Factor. I downloaded the bootpack for a Optiplex 745, LION installation. It did not recognize the internal disks as they are not ACHI compatible in the BIOS even with the latest BIOS updates. I addded the IOATAFamily.kext to the Extra\Extentions folder on the usb stick, put the BIOS in legacy mode and was sucesfull in installing LION. Booting did not work, I needed the option to Ignores kext caches during bootup, after booting I placed the -f flag in to chameleon config. When I applied the EDP package I lost the disk as the IOATA familly kext is no longer present. I have tried to report an error on the site, but all forms seem to be disabled for maintainance. I installed the Extra folder from the usb stick to revert. I assume that that also reverted all other EDP installation/actions. Is that correct ? Now I did not have any sound, but networking is working. Graphics is a internal IntelGMA 3000. Resolution was only 1024*768. Not enough.... I changed the Graphics Mode to 1280*1024*8 in the org.chameleon.Boot.plist, and added the AppleIntelGMA950.kext to the extra folder. Questions I have: Can you make the EDP more robust by adding the IOATAfamily and IntelGMA950 kext to the configuration for a optiplex 745 USFF ? What changes do I have to make to get the sound working? or will that be fixed automaticly by the EDP ? Is the option to ignore the kext caches during bootup normal for the 745? Can anyone recommend an USB Wifi adapter that will work with this configuration? Thanks a lot for all the information on the site so far. Kees