2. Don't lock it, just close a webpage

Here is a simple brute-force modification of vanity.java to do what you wanted. Sorry, I have no place to upload a compiled binary, you would have to compile the java file yourself. I only modified the main method.

So if you want an account starting with 666666, and having a secret phrase starting with "nxt rules ", running:
will give you result such as:
(and keep trying, to get a shorter account number).

It will start crunching numbers trying to create the smallest account number. The secret phrase will look as PREFIX+some_random_digits.

If u have Java installed then I can release my program.

Edit: I already generated a small account id (131110410587) for faucet. Burned a lot of electricity

4. Write down the account id, it will be used to claim NXT

2013-10-26 07:56:34   Withdraw   1.50017354 BTC      Processing