Can you make place profile fields in phrases?

[futuredood]

I created a custom profile field for first name and last name. Throughout my message board, their are phrases that have {1} in them that represent a persons username.

How can I set it up so that I can change {1} so that it can be someone's username. I can think of two options, but don't know how to get their of it they work:

1) create a new {2} that represents certain profile fields
2) search and replace {1) with $post[fieldxx]