Phase 1
Very often when one purchases a box set via a download store, the files are bundled in one folder (see picture below). Given that the only way that internet services (FreeDB, Gracenote, GD3) identify a CD is by its TOC (Table Of Content, meaning having all the tracks belonging to that CD and sorted by track number order), it is a very good idea to keep one CD per folder. By the way, Amazon does always list a box set grouped by CD as well. We can automate in this case the creation of sub-folders and moving the files where they belong.

Go to the MusiCHI Tagger main menu, Click “Edit” , “Box set wizard”, “Group files per CD”, this form will pop up.
1) Fill up the “Folder name of the recording (Top level)” either by dragging the folder from Windows explorer or clicking
.
2) Select the audio file formats, we are not going to move the pdf booklets or the CD graphic cover(s).

3) Now comes the tricky part the “CD number starts at character” and “Length in characters of the number”. In this example the files are named in the following fashion:
01-20-3b_Capriccio-LLS.flac
02-01-1a_Largo-LLS.flac
The CD numbering starts a the first letter in the file name and is 2 characters long, hence the value 1 and 2 in the picture above.
If the file pattern was 2-01 Concerto, Wq 43, 6 in C maggior.flac, the values would be 1 and 1; If it was CD [02]-01 Concerto, Wq 43, 6 in C maggior.flac, the values would be 4 and 2.
4) Sub folder initial name is the word for writing the sub folders “CD” is the most common, you can write “Disc” or whatever you like provided it does not brake windows file name conventions, an advice, keep it short.
We started with:

We click “Proceed” and we get after processing:

or

and viewed grouped by directories

We are done.
Phase 2
Now that the files are where they shoud be, or you started from that state having ripped with the MusiCHI Ripper this box set with the proper file pattern (with the CD number in it in) for example: 
Now, we are going to fill up automatically the following fields:
Please go to the MusiCHI Tagger main menu, Click “Edit” , “Box set wizard”, “Number CDs and albums”, this form will pop up.

It is very similar that the previous one:
1) Fill up the “Folder name of the recording (Top level)” either by dragging the folder from Windows explorer or clicking
.
2) Select the audio file formats so we can tag only audio files.
3) Fill up the album/box set name according to your conventions.
4) Add a number also in the “Album” tag, if you do not want that extra bit of information there, leave the text blank in the “Numbering prefix…” field.
Then click “Proceed”
We stated like this:

The metadata has been adjusted:

As well as the Album name:

If you have to tag the famous “Gustav Leonhardt Edition” which has no less than 14 CDs, you will realise how nice this box set wizard is!