The shoreline data comes from here. All the datasets at this location have too high of resolution to be usuable in Flash so they have to be reduced in size.
gshhs_dp was used to create several datasets with reduced numbers of polygons and points. For example,
si75.xml was generated using a 75 km tolerance from the
gshhs_i.b data file (actually,
gshhs_dp produces an intermediate binary file that can be converted to xml using this program).
shoreDataFiles.rar – contains several datasets of different resolutions
Finally, you will definitely want to get version 7,0,14,0 of the flash player (link).