To burn ISO / BIN-CUE / NRG image with Nero start Nero Burning ROM, go to Recorder menu and click on Burn Image... like shown on the picture below.
Next choose image file which you want to write. Now you have to specifiy some option in this dialog. To keep compatiblity leave 'Finalize CD' switched on and select Track-at-once for Write method option. Click on Burn button.