Employee suppliers for iExpenses- R12

Hi,

We currently do not use iExpenses but are looking to do so in the near future.  Employee expenses are entered manually as invoices in AP at present with suppliers being set up as strandard suppliers (and not employee suppliers)

When we do move to iExpenses, is it possible to update the existing suppliers that we have created manually to be useable for iExpenses?  or do we need to create new employee suppliers?  

Thanks

David