Can you import your own icons to attach to the different accounts. i.e. Barclaycard, Barclays Banks etc
No, it's no possible.
This is possible, you place the data\usericons folder, provided they are 32 x 32 they are imported when the program opens, if they are larger, a warning message is displayed and they are not imported
I suggest you to put number first in each icon number.e.g. :01 Food.ico02 Pasta.ico...Like this the software can refer to the same icon and for new user icon you implement the reference