Payables accounting process:Rounding accounts

[rb123v]

This is multiorg environment. In one org we have so many countries.
In payables accounting process, whenever there is change in exchange rates then "rounding" value generates for an account. This account is coming from payables options for that organization.
I need to customize this Rounding account segment values, Are there any hooks available in any packages related to payables accounting process?

What is the best option to customize this account values? is it during payables accounting process or after completion of payables accounting process through custom program? what tables generates Rounding account values?
I didn't see any columns related columns in AE tables

Please clarify above questions asap.

[admin]

What is your Apps version? tks

[rb123v]

11.5.10.2 with OIE.K