The easiest way if you are using a Bitcoin clone is to 'instamine' the first few blocks by having grotesquely large rewards  - I think I am right in saying. I don't think you can avoid doing this whatever proof you are using to validate blocks unless you substantially change the code. Then you need to update the checkpoints before releasing the node software. If you have plenty of time you can do this over a few hundred or thousand blocks - the key is to be honest about this in your ANN as the emmission parameters will be obvious to even casual users with access to the source code.

7. Checkpointing the premine.
...
Recompile you client.
Back up your  C:\Users\(YOUR**PC**NAME)\AppData\Roaming\clonecoin folder. This now has your premine.
You now need to check the checkpoints are correct. On the client that does not have the premine, navigate to  C:\Users\(YOUR**PC**NAME)\AppData\Roaming\clonecoin and delete all contents besides your wallet.dat(Very Important Do NOT DELETE) and clonecoin.conf files.

Restart the client. If your checkpoints are correct the client should update and sync without issues.