- I rename my old "x_wallet.dat" back to "wallet.dat"
- I start the bitcoin client again (now running on my old wallet.dat again)
- I transfer a certain amount of bitcoins (0.10 BTC in this case) from here (i.e. from my old wallet) to the new address "xyz".
- The payment appears in the bitcoin client, first as "0/unconfrimed", and then, as usual, after some time as "105/confirmed", with increasing number of confirmations as time goes by...
- I close the bitcoin client again
- I rename my old "wallet.dat" to "z_wallet.dat" again.