Nero should do the job for you, check under extras --> choose recorder --> options, the bitsetting.
What medias are you using? I think that your problem with the qualitity is media related, and you will have no better results when you do bitsetting.
BTC drives are known for their not very good quality and they work best when you use quality medias. just take a look to the BTC forum to find out which medias are working good with your device, some users have posted their experienses there.
Here is a screen from my 1108IM, it should look same with your 1008IM