Import Bank Flat File (CBI Italy)

Hi,
first thanks for your support in advance! I already have learned a lot from this forum, you deserve the best.

I have a flat file which I'm trying to understand if I will be able to import with the import/export framework (alredy used from some xml, but not with flat files)

File example:

EC01030BT9FF010616CC03061614064665823
610000001 93003CONTO A PACCHETTCCK0103020602000001452348EUR010516C000000233813,87IT92
620000001001020516020516D000000000760,162626 0260001037400083NROSUPCBIN.D.
630000001001DISPOSIZIONE FILIALE DISPONENTE 1217 ID FLUSSO CBI: 23409779 NUM. TOT. PAGAMENTI: 1 IMPORTO BONIFICI: 759,4
6300000010011 IMPORTO COMMISSIONI: 0,75 ORD.ORIG:
620000001002020516020516D000000010240,752626 0260001014400006NROSUPCBIN.D.
630000001002DISPOSIZIONE FILIALE DISPONENTE 1217 ID FLUSSO CBI: 23399399 NUM. TOT. PAGAMENTI: 1 IMPORTO BONIFICI: 10.24


The first line is the opening line (bank statement)
The second line is something commercial (starting w/ 61*)
The third line is something I need to import (starting w/ 62*)
The lines starting with 63* are extensions of 62* lines

In XML this would be:

EC01030BT9FF010616CC03061614064665823
<61*>
<62*>
<63*>
...
...


How can I define this structure in a flat file import definition schema? Is it something that can be done?

Many thanks
Francesco