Earlier I was on iPad so it wasn’t convenient to search for that review of open wallets that I mentioned.
I’ll post a link to updated how-to shortly.
Edit: I tried and was able to access my Counterwallet address by simply using @loon3’s XCP wallet for Chrome.
It’s a Counterparty wallet. You’d enter your Counterwallet pass phrase in this case, not the private key, and be able to access both BTC and XCP and other tokens.