CSV Import with Ip Address + Date Added + Status

Hi, I couldn' find an anwser in the forum. I have 2 CSV.
  1. Subscribed users
  2. Unsubscribed users. I want to import them to for archiving purposes.
How should I name those columns to have them imported as well?


I already have an "IP address" and "Data Added" column, but they're imported as a new custom field.
@Sebastian - All import option implement same interface, so they are pretty much the same, if you need to do a change in one, you'll have to do it in all if you want same behavior for all.