- Generate a new P2PKH address using your wallet software or a tool like vanitygen.
- Choose a lock time in the UTC timezone. Due to upcoming changes to the protocol it is suggested to subtract about one hour from the desired lock time.
- Click Create.
- Save the redeem script and address.
- Identify the hashes of the funding transactions, the indices of the outputs (starting from zero) and their amounts.
- Input the private key of the encapsulated address, the redeem script and the destination address.
- Adjust the fee.
- Click Spend.
- Copy the hexadecimal representation of the transaction and broadcast it.