Oracle Purchasing Receipting

Our Oracle set up has a bespoke module for generating accruals and
works certificates (which then generate invoices). We recently
swapped over to receipt accruals and, unfortunately, the module
doesn't generate a receipt for each invoice generated. This means
that, until we get the module replacedd/updated, I'm having to
manually enter £200m of receipts at then end of each month.

So my questions are these...

Can PO Receipts be loaded up from a table? If yes (and I presume they
can) what's the simplest way of doing it and what problems might/would
come up?

Our IT provider has TOAD and our Internal Sys Admin has SQL Dev.
Would using one of those tools be suitable?

It needs to be cheap (because we'll spend a lot in updating later),
but reasonably quick and very accurate (i.e. it should validate as it
loads).

Could anyone point me towards any site that discusses this or any
other tools that could be utilised? We currently use More4Apps for
Budget loading and Project maintenance, but they don't appear to have
a tool for PO receipting.

Any help would be very gratefully received.

ta