If you only want the license to be copied (and not all the settings):
1. install it on your own machine;
2. enter in your own license;
3. copy %programfiles%\serv-u\ServUDaemon.ini to your unattended setup;
4. add a line that copies this file to the installation directory after silent installation;
5. don't forget to kill ServUAdmin.exe after installation, it pops up.
//edit
if you want the wizard to popup the next time you run serv-u, make a file named "ServUAdmin.ini" which contains the following:
CODE
[GLOBAL]
FirstTime=1
copy this file together with ServUDaemon.ini to the destination directory after installing serv-u silent
//edit2
i'm sorry for digging up such an old thread