Hi - just to confirm, Berhan's advice is how I do my own expenses only I have Toggled off the expense claim (which creates a bill) and use the Ad hoc method which creates a creditor account specifically for expenses.
In general terms having a dummy bank account as a Director's loan account is a great idea as you can make sure that all the sums owed to a director appear in one place, plus you can handle all the movements in & out via the manage money or quickpay screens. So, in my books any salary, dividends or expenses I am owed all end up in the DLA.
Many of my clients will also use the company credit card or bank account to pay out for personal expenses. In the past when explaining these you would have to enter up the full transaction explain screen, (including VAT) to make sure they ended up in the Directors Loan Account balance sheet code, whereas now they are merely a transfer from one bank account to another.