I saw this URL on another download site
http://magnifiqueapp.com/
It does what shapeshifter does in file overwriting (with backup of course) way.
IMHO Unsanity should have released a Leopard edition without APE exactly. Well, some people have done it.
Shapeshifter's method is still the safest and way more reliable. If you keep running Tiger, there is no reason to give up.
It seems we lost shapeshifter thanks to the anti ape trolls and jealous developers. Hopefully I will be proved wrong but it seems so...