Wireless to Wired router question

[Clockworks]

I recently won the parkervision SignalMAX one mile router. The problem is, my father has a linksys wired firewall router that he doesn't want to get rid of. I currently set up the wireless router to work with the wired one by plugging my PC's connection to one of the LAN ports in the wireless. It works and everything but I don't know to how to access the wireless router (192.168.150.1) so I can configure the thing with some security. Can anyone help me out as to if this is possible or not? Any help will be appreciated.