You do not need to add your BB PIN number to your wireless access point. I think you might be refering to the MAC address of your BB. This would only be needed if you are using the MAC address filter feature on your wireless access point.
There are four things you need to add your BB onto your wireless network.
1. the SSID (if your SSID is not broadcasted than you will have to enter it manually instead of being able to search for it)
2. the encryption type (if encryption is used)
3. the encryption key (if encryption is used)
4. enter the MAC address of your BB into your router as stated above if MAC address filtering is configured
