TREZOR Wallet utilizes Insight/Bitcore in order to grab information about cryptocurrency/blockchain. A functioning Insight is therefore the main requirement for integration of any coin into TREZOR Wallet.
(Bitcore has already been ported to ppc by hrobeers.)
Note: You can use an existing Bitcoin data directory,
however txindex, addressindex, timestampindex and spentindex
needs to be set to true in bitcoin.conf, as well as a few other additional fields.