This could be a bit tricky, seeing as how there aren't that many officially released WM5 AKU 3.5 ROMs out there. Most of the current AKU 3.5 ROMs have been based off of Helmi's release, which (according to
this xda-dev wiki page) he (indirectly) got from a Benq P51. Anybody know anybody with a Benq P51?
