Sort:  

Use the private key they provided, and after you have created your Peerplays account issue the "import_balance account name ["privately"] true true" command

is there a way I can just use my already existing bitshares wallet

Yes, but you needed to own bitshares on your wallet prior to the snapshot that took place on Sept 2016. Use import_keys "bts-youracountname" privatekey to import your bitshares account.

Coin Marketplace

STEEM 0.16
TRX 0.16
JST 0.030
BTC 57983.67
ETH 2465.71
USDT 1.00
SBD 2.41