Bank Account Details

Hello,

I am a new user of frontaccounting software and I have some questions regarding to it. I am already accountant and want to use this software in my accounting projects.
The Bank accounts are not complete functional in FA I think. I see that there are few fields for company accounts which is not enough to print out Invoices or create Payment Orders directly from FA and use them. This is same for Suppliers too, on new supplier entry there are no bank account selection for them.

I am also acknowledged about programming and ERP software implementation. I have edited SQL COA for to have new database fields  such as SWIFT, IBAN, Branch code... for bank details and added some values. Then I have directly executed this in database and it replaced existing  cells and columns as I need. But the problem is the user interface not changed and same fields are displaying on Banks page. The result is I also need to make required modifications for "bank_accounts.php" file too. This is not good procedure as on program update it will require to re-modify required files. And also there are no guarantee that current bank details fields vars are used on other files within software.

I want to know is there are any method to making such changing with editing core files, may be some coding hooks or anything else? Question is not only for bank details but also other modules too.
Second question is, which framework (Smarty...) or structure used to build up current software?

Overall this software is perfect in terms of GL account types and structure.

Regards,
Turkel.