You can do this now as long as you can get the invoice amount and customer in the Excel sheet.
One way of doing that would be to use GridView to export the current transactions (or a SmartFinder view into the documents if you're running AR 9.0A) and export the invoice number, customer number and current amount to Excel. Then use the Excel =VLOOKUP() function to locate the row for the invoice number and retrieve the customer and amount to place in the Excel sheet you want to import as a cash batch.
I agree it's a bunch of steps, but it's free and available now. Why not come to the
AOC and find out how?