OK, right if I understand the problem correctly....you have a single large MP3 file (probably ~70MB depending on the bitrate when ripped), which comprises of all the tracks including the spaces between the tracks. And when you play this MP3 file on your PC, you you dont have the ability to skip up and down the tracks, like you would with a CD, and you need to drag the slider to the timeline and start playing from there?
If im right, then read on.... if not then i misunderstood your question.
What you need to do is to use a special text file called a .CUE file to tell Nero what data you are burning and how to process your data files (MP3's)
The .CUE file lists details of the source file format (in this case MP3 audio), and also the track start times, to control the burning software writing the 'track start' information.
Once completed, the single MP3 file will then be burnt to CD, but it wil have been 'split', into the separate tracks, for you to navigate through the music selections.
Its not as complex as it sounds. Here is a sample .CUE file for an MP3 file which lasts 60 minutes, with each track lasting exactly 6 minutes. The start time of the track is the important entry.
The File entry on the 3rd line is critical and must be have the name of your source MP3 file exactly correct. If you CD burner supports writing of CD-Text then you could additionally amend the Track01, Track02 with the actual track names, so they appear on the device.
PERFORMER "test_cue"
TITLE "test_cue"
FILE "test_cue.mp3" MP3
TRACK 01 AUDIO
TITLE "Track [01]"
INDEX 01 00:00:00
TRACK 02 AUDIO
TITLE "Track [02]"
INDEX 01 06:00:00
TRACK 03 AUDIO
TITLE "Track [03]"
INDEX 01 12:00:00
TRACK 04 AUDIO
TITLE "Track [04]"
INDEX 01 18:00:00
TRACK 05 AUDIO
TITLE "Track [05]"
INDEX 01 24:00:00
TRACK 06 AUDIO
TITLE "Track [06]"
INDEX 01 30:00:00
TRACK 07 AUDIO
TITLE "Track [07]"
INDEX 01 36:00:00
TRACK 08 AUDIO
TITLE "Track [08]"
INDEX 01 42:00:00
TRACK 09 AUDIO
TITLE "Track [09]"
INDEX 01 48:00:00
TRACK 10 AUDIO
TITLE "Track [10]"
INDEX 01 54:00:00
Let us know how you got on.