If I'm interpreting this correctly, you're problem right now is that you have an mp3cd where (in a cd player) the songs are seperate tracks but at the same time they flow in to each other. When you put it in to iTunes, you're getting a short (but annoying) gap between each track.
Your question is that you want iTunes to play the songs as one huge track.
Solution:
Go to edit>preferences choose the audio tab. Up on top there will be a selection called Crossfade playback. Check that box and lower the number to '0'
The only problem w/ this is that it will apply that to your entire library. Now, given you're only going to listen to this one cd that you've been laboring so long to get to work all will be good. Just when you want to listen as you would usually listen on itunes, uncheck the box.
I used an original cd to do this, though. I'm not sure if the same rules apply when working w/ an mp3 cd.
Hope that helped.