Multiple Invoice number in Single Creditor node in DMEE

Dear Experts,

I have a requirement in DMEE.

i want to show the mutliple Invoices under one creditor node.

eg:-

I have 2 vendor AB & CD. each vendor has multiple invoices say, AB has 3 invoices & CD has 2 Invoices.

Now in Creditor Note of DMEE. I want to show the 3 invoices of AB under Creditor node of AB & 2 invoices in Creditor node of CD.

<CdtTrfTxInf><AB>Invoice 123><invoice 234><invoice 345>

<CrdtrTxinf><CD><invoice 112><Invoice 113>

Currently my DMEE is working as below.

Dmee is creating one Creditor node for each invoice.

eg:-

<CdtTrfTxInf> <AB> <Invoice 123>

<CdtTrfTxinf><AB><Invoice 234>

<CdtTrfTxinf><AB><Invoice 345>

<CdtTrfTxinf><CD><Invoice 112>

<CdtTrfTxinf><CD><Invoice 113>

Please let me know how can i acheive this.