-Xperia X10 Mini
-Xperia X10 Mini Pro
-Xperia X8
To initialize your local repository using the Old Xperia trees, use a command like this:
repo init -u git://github.com/OldXperiaTeam/platform_manifest.git -b JBMP42
Then to sync up:
repo sync
Please see the CyanogenMod Wiki for building instructions.