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
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If you notice cash flow tab will be like below example.
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Payment details tab as below example
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Hope this help.
Regards,
Jain