There's only 1 option you *might* need to change - the 'DVD+R Reserve Track' one in the settings on the Write tab.
If you configure Discovery mode to write more data than listed for 'Free Sectors' in the disc info text on the right, it'll either work or it'll error out.
If it fails with 'DVD+R Reserve Track' disabled, try it on another new disc with it enabled.
If it fails both ways, your drive can't do it.
Of course failure comes at different levels. It writing to anything beyond the 'Free Sectors' value is a success. Where it gets up to beyond that point is the amount of overburn your drive can do on the media you're using. Different discs will allow for less/more overburning.