Have forgotten NetKey password to add laptop to wireless network

Have a Linksys Wireless G router. Functions fine, have one laptop already on the network. I have a new laptop to ADD to the network, I have forgotten my netkey password to access my own network and add another computer. I can see the *** for the number of characters but for the life of me, cannot remember what I used.

Should I disconnect everything and reset the router and add both laptops as if new?