Sometimes we need to inject additional properties into device-tree.
SMBIOSEFI.kext should be consider as obsolete.
UUID.kext injects PlatformUUID, now all bootloaders do the work.
Natit.kext is used to inject properties for PCI devices. The work may be done by bootloader, but not all. Some by DSDT method _DSM.
But if you want you can still use Natit.
Look its possibility
 Natit.kext_Snow32_64.zip ( 15.99K ) Number of downloads: 62
 Screen_shot_2011_05_20_at_12.21.26.png ( 52.85K ) Number of downloads: 94



And if you want to inject EFI properties you need new injector
 DTinjector.kext.zip ( 14.29K ) Number of downloads: 68

 Screen_shot_2011_05_20_at_11.59.47.png ( 72.42K ) Number of downloads: 140


Read info.plist, correct at your will and enjoy!

EDITED: replaced with working version.

FAT version 32/64
 DTinjector.kext.zip ( 16.01K ) Number of downloads: 6

 DTinjector.kext_Lion.zip ( 14.07K ) Number of downloads: 4