HTC Hero :: (Copy / Paste) Editing Phone Number From Text Message?

I am switching from a BB. I receive text messages from my office with client's phone numbers. We prefer to keep our mobile numbers private, so we need to block our caller id on a per call basis. It wouldn't work for us to block caller id on all calls. On my BB, I would copy and paste the number and then add *67 as a prefix.

On the Hero I can't find a way to edit the phone number from the text message. I can delete it, but can't add to it. Most of these numbers I would not want to add to my address book. I had my office text the number with *67 as a prefix, but the Hero doesn't recognize the *. It just copies the digits. What workaround options do I have?