if you can get the initial thing set up by using a monitor, keyboard and mouse then you can simply install any of the VNC variants (OS dependant) such as UltraVNC, tightVNC or realVNC. Once its on and set up to start on boot you'll be able to connect to the box remotely whenever you need. I think all are free but some cost if you want more secure options etc.
I've used UltraVNC most recently as its free for all options. It worked a treat over a wireless connection allowing me to sit in the garden on the laptop while working remotely on my main PC

Si