Hi,
If you're using jmp 10.0.1, some new functions are available
http://support.sas.com/demosdownloads/000981/JMP_1001_release_notes.pdf
JSL File and Directory commands are available, including :
File Exists( path )
Directory Exists( path )
Copy Directory( from, to, {1/*recursive*/} )
Copy File( from, to )
Move Directory( from, to )
Move File( from, to )
Rename Directory( old, new )
Rename File( old, new )
Delete Directory( path )
Delete File( path )
Create Directory( path )
Last Modification Date( path )
Creation Date( path )