First, install server side follow the mannual, when you are asked for activation code, go to sibelius registration page, type in your computer code and serial number, get the activation code. Finish the installation. Easy.
Second, install the client on each computer, put in the serial number and Server name, it will automatically registerd to each computer.
Third, install the patch 7.0.3 you download from sibelius website, there will be no more dissapearing applicaiton anymore. Enjoy.
It indeed a great software, what a shame I don`t remember how to read staff, did I actually learn staff before, can`t remember. lol.