Unfortunatly there are no highly detailed Freeware alternative for these airports, as both have highly detailed counter-parts in the Payware industry. Mainly: Imadginesim Denver and Cloud9.

After searching the SimV library, I found nothing, and so the only freeware alternative I can offer is here, for Denver (here is the update) and here for Orlando (please not, I have not downloaded these sceneries myself, and so cannot vouch for their quality)

Alex