As you can see in the code you have two ways to asign the bmps you will show at the button.
1) to assign 4 bmps for each button
resource "bmp1", "bmp2", "bmp3", "bmp4"
2) to assign one multiple bmp to the button if you see at seatm.bmp (the "m" is for multiple) you will find four images in it.
resource "animated bmpmultiple"
What you have to do at the buttons with multiple bmp is to change RESOURCE "animated seatm" for RESOURCE "seat1", "seat2", "seat3", "seat4" using 4 bmps and not a multiple bmp, multiple bmp support doesn't work properly wiht [x]Harbour.
(Of course you will have to create seat1.bmp, seat2.bmp becouse they dont exist)
I hope this will help, Im sorry for my bad english.