Quick start guide:
ftp://ftp.dlink.co.uk/dsl_routers_mo...ig_english.pdf
Full manual, including instruction on how to set up the wireless:
ftp://ftp.dlink.co.uk/dsl_routers_mo...24t_manual.pdf
This will give you the information you need. Log into the router to begin with from a WIRED connection.
Setup the wireless using WPA with a Pre-Shared Key using a 63 random character key. This page:
https://www.grc.com/passwords.htm
will generate a suitable high security key for you, just make sure you copy and paste the string to a notepad file and save it somewhere!
Make sure the firewall and NAT are enabled.
Duncan.