Enhanecment Issue for a standard dynamic report

Hi experts;

     I'm an FI consultant at  customer site, and we have a support from our service provider related to some other areas, one of these areas is the ABAP.

     The issue is: we have a requirement and there is an debate between us and our service provider whether it can be done or not, so I kindly need your consultation regarding such matter whether it can be done or not.

     The case is:

There is a standard transaction on SAP to build a Financial Statement Version. Below is the path for such transaction on the SPRO

inside I can select accounts to be presented on the report at the time of run report from T-code F.01

But, the standard version on system forces me to only select GL accounts however I need to select Sub-Ledger accounts as well.

So the question is:

Can the ABAPer create a Z form same as the standard and to add feature to enable me to select Sub-Ledger beside the major ability to select GL accounts?

Some aditional screens to show the steps after selecting the above path:

Then select the highlighted line:

Then to select the botton Fin. Statement Items on the top to left will be the following screen then

Then highlight over the lowest level line then select the botton Assign Accounts on the top in the middle

Here u may find the selection fields which allows me only to select GL accounts and the requirement is to select Sub-Ledger accounts as well from tables BSIK and BSAK for vendors and BSAD and BSID for customers.

So I hope if someone can kindly help;

Many thanks in advance;

Best regards;

Ahmad Mahmud;