itunes renamed filename as tracks?

Apple itunes cannot use filename to import songs, it uses tracks instead?

The field <file name>, for all my mp3 is apparently NOT used by iTunes, for sorting. As a conclusion my library is totally messed up. I need some help...

Here the details:

I have organized my audiobooks for years, in this way:
file-name: D01 T01.mp3 then D01 T02 then ....then Dn Tm.
No id3 tag.
D01 T01.mp3 means the first track on Disc 01

D05 T14 means the 14th track on Disc 05

Usually audio books contain from 1 to 5 or 6 CDs

Across the years, i ripped all my mp3 with the same structure.

I put album info only on the folder name. For example, my last audio-books set was from Brian Tracy.
For the folder name I chose "Brian Tracy - Psychology of Selling"

The content includes
file-name: D01 T01.mp3 up to D05 T10.mp3

The software I used (Media Monkey) also filled automatically these fields:
title: track 01 up to track 10 for disco 01, then again track 01 to track 10 for disc 02, etc.

I have started to use iTunes since November. But every time I try to import I see that:
- file names are TOTALLY ignored
- I end up having 4 (FOUR) mp3 files called track 01, then another 4 (FOUR) MP3 files called track 02...and so on until track 10...a completely mess!

Since <file name> field (D01 T01.mp3) is apparently NOT used by iTunes, the conclusion is that my library is totally messed up.

Additionally iTunes imports the folder WITHOUT Looking at folder name, so all folders, in iTunes, show as "unknown artist , unknown album". This second issue is solved by me by manually editing the folder name and artist name (using "getinfo" function)

Question:
can somebody explain to me how can I force iTunes to import and sort my file using the FILENAME field (D01 T01.mp3) ? Instead of title field (track 01) ?

Any help is heartily appreciated!
SA