There is a number of ways to install a Mac Mini Server Remotely. I found the following way seems to be the easiest among the others.
Pre-requistics:
1. you have a Mac Mini Server connected to a Network (preferably over Gigabit Ethernet)
2. you have a Mac Book connected to a the same Network with the Mac Mini Server (preferably over Gigabit Ethernet)
Procedures:
1. Insert the Installation DVD onto the Mac Book.
2. on your Mac Book, Open the HDD > Applications > Utilities, Start Remote Install Mac OS X
3. Press and Hold the “OPTION” key (or “ALT” on a PC Keyboard) on the Mac Mini Server and turn on the power
4. Select the Target Installation Disc to start up the computer