Dear Krishna,
Please follow below step as suggested by Grigoriy too. First create new house bank customization in FI12 , Then make the customization setting in FBZP as all the payment will happen through F110 or F111.
Create a deal like below example, say for example i have to invest 20M in 3 different bank, i created the same like below. Please enter details as below then go to payment details tab
If you notice cash flow tab will be like below example.
Payment details tab as below example
Hope this help.
Regards,
Jain