I also have the worlds as Sims3packs and the rest of the store content as .packages. Try putting all four KT Fix Files in your Override folder. Make sure your resource.cfg file is set to recognize your Override folder, and that your Override folder is set to be "read" before your "Packages" folder.
How do I set that up? this is what the resource.cfg file looks like
Quote
Priority 501
DirectoryFiles Files/... autoupdate
Priority 1000
PackedFile Overrides/*.package
PackedFile Overrides/*/*.package
PackedFile Overrides/*/*/*.package
PackedFile Overrides/*/*/*/*.package
PackedFile Overrides/*/*/*/*/*.package
Priority 500
PackedFile Packages/*.package
PackedFile Packages/*/*.package
PackedFile Packages/*/*/*.package
PackedFile Packages/*/*/*/*.package
PackedFile Packages/*/*/*/*/*.package
Priority 499
PackedFile Test/*.package
PackedFile Test/*/*.package
PackedFile Test/*/*/*.package
PackedFile Test/*/*/*/*.package
PackedFile Test/*/*/*/*/*.package
Priority -50
PackedFile Probation/*.package
PackedFile Probation/*/*.package
PackedFile Probation/*/*/*.package
PackedFile Probation/*/*/*/*.package
PackedFile Probation/*/*/*/*/*.package
Priority 500
PackedFile DCCache/*.dbc
DirectoryFiles Files/... autoupdate
Priority 1000
PackedFile Overrides/*.package
PackedFile Overrides/*/*.package
PackedFile Overrides/*/*/*.package
PackedFile Overrides/*/*/*/*.package
PackedFile Overrides/*/*/*/*/*.package
Priority 500
PackedFile Packages/*.package
PackedFile Packages/*/*.package
PackedFile Packages/*/*/*.package
PackedFile Packages/*/*/*/*.package
PackedFile Packages/*/*/*/*/*.package
Priority 499
PackedFile Test/*.package
PackedFile Test/*/*.package
PackedFile Test/*/*/*.package
PackedFile Test/*/*/*/*.package
PackedFile Test/*/*/*/*/*.package
Priority -50
PackedFile Probation/*.package
PackedFile Probation/*/*.package
PackedFile Probation/*/*/*.package
PackedFile Probation/*/*/*/*.package
PackedFile Probation/*/*/*/*/*.package
Priority 500
PackedFile DCCache/*.dbc