Access multiple ledgers through a single responsibility - NOT via data access set? (R12)

Hi

I would like to access multiple ledgers through a single responsibility. I intended to do this by creating a data access set that contained all of the ledgers, and then assigning that data access set to my GL responsibility.

However, my ledgers have different COA structures, therefore I cannot put them all in a single data access set.

Is there any other way for me to access multiple ledgers through a single responsibility - perhaps through security profiles?

Thanks