1) how to change what percentage POS uses from my balance.
2) does it generate based on chain start time or based on the length of time i've held the coins.
3) Is POS CPU only or does GPU push the process along
4)why does stake percentage vary? i had two wallets with similar amounts but they gained different stake
5) say stake generates @ 2 months, do i need to keep my client running, or only start it when i'm close to two months?
(1) reservebalance in the coin.conf file.
(2) Length of time. Difficulty and reward of generating a stake block is based on the coin-age (size*age) of a transaction.
(3) Currently CPU only. There are no benefits to pushing it to a GPU, because of the small amount of hashes that can possibly be tested.
(4) Like mining, stake generation is a luck-based process. So stake can vary between wallets. Also if tx-outs are too small their stake can be truncated.
(5) If you are purely using it for stake generation, start the client at the 2-month mark.