I've done it, but can't remember exactly how and have since closed the current account and kept just the Orange account.
I incurred bank charges, dating to when the current account was first opened, as it was the first time there had been money in it.
It's calculated at around 6tl for each month that you've had the account.
This was because I had no direct debits set up with ING, so if you aren't already using the current account and have no direct debits I would suggest you go to the branch and withdraw money rathert than transferring it over.