Just two things to add, in case you are wondering:
You can also change all tracks to 0 secs pause, which is somewhat easier (just "select all tracks" and in Properties change Pause to 0, ignore the greyed out fields in that dialog box) - Nero will change the first track back automagically. The info about writing CD in "Disc-At-Once (DAO)" mode is important!
The 2sec pause before the 1st track is called "Pre-Gap" or the like, dont remember exactly - when playing the Audio CD it will not just be there, the 1st track will start immediately!. It is just a requirement of the Audio CD standard. IIRC it had sth to do with Audio Players finding the correct start of the audio or so.