Secure FTP Server - howto install silently?

[WotC]

hi!

anyone any ideas how to install Globalscape SecureFTP server?

http://globalscape.com/gsftps/

Its an Installshield, i know. i created the iss file. however, return code is -3...

( http://publib.boulder.ibm.com/infocenter/i....doc/cpi116.htm )

-3: Required data not found in the setup.iss file.

The problem is the install script asks for an admin password - is there any possibility to circumvent/prevent this?

thanks in advance