No, sorry. I don't think it can be done in this version.
As you will have seen, the Express Labeler is very simplified and totally unsuitable for your job.
The Roxio Label Creator will read and save the names of 56 tracks, but getting them all displayed so you can read 'em just isn't going to happen. (I got 62 in here)
Some earlier Roxio labelers could do twin columns, but this one doesn't. [and NXT 6 doesn't even have labelers at this point]
About the only way I can think of is to type your 56 track names into a word processor and put them into two columns.
Then cut and paste, or take a screen shot of that page, trim the resulting JPG and drop it onto Roxio Label Creator, dimensioning it to fit the back of the CD case.
That seems a lot of fluffing around and hard work, though.