By the way you can do it on Hamachi (without 2) as well.
1. Click the Configure Hamachi button (the gear) and select Preferences.
2. Click the 'Presence' tab and check the 'Enable' checkbox in the 'Online Presence' part.
3. Next, a button will appear next to the 'Create or join network' button. Click on it and select a status you want to show ^^ .
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Honesty is the best policy.