Text original - Anglès - Now we need mkextMaker v2.2 utility from here...

Now we need mkextMaker v2.2 utility from here
Drag Extensions folder from Snow HDD on mkextMaker icon and mkext maker will make extensions.mkext in you Extra folder.
Remove the IOATAFamily.kext from /Snow/System/Library/Extensions and replace it with the file you'll find in the SL pack
(it's Leo 10.5.8 Version)
Step 4