Hi Lucas

If I were you, I would:

1) Use an optional text field in AR and label it "Name Overflow" (Edit | Company Profile | Optional Fields)
2) Do the same thing in OE, making sure to use the exact same label - doing this causes the optional field to pre-fill when entering an order.
3) Enter the overflow name in the optional field in AR for this customer.
4) Modify the OE invoice spec to display the optional field on the same line as the Customer Name field. Since the optional field will be empty for other customers, it will have no effect on other invoices.

With the latest version of OE, you can modify certain fields on invoices, and the optional fields are modifiable.

Steve