To answer you first question, in theory you could read in the swf and modify particular parts of it, however you would need to know exactly what you were looking for, swfs are compressed so there won't be a simple link to regex. To be honest I would just modify the swf to receive its parameters, its the more sensible way to do it. As for your second question CPAN has several modules which create swf's on the fly check out <A HREF=http://search.cpan.org/doc/YSAS/SWF-File-0.08/File.pm">SWF-File-0.08/File.pm but you have to think about do you really want to generate a swf and why? Would it not be easier just to modify the swf to receive the inputs ? HTH