Trying to consolidate my networks

I'm looking to bring all of my computers on to the same network at home. I use DSL so I have a DSL modem, I also have Vonage so I have a Motorolla router for that. Both of them are currently set up to do DHCP and one give 15.x and the other gives out 0.x addresses. I would like to consolidate them onto the same addressing scheme (0.x) so when I connect wirelessly to my dsl router I can see my desktop (which connects to the Vonage router). Is there an easy way to do this? I've been looking all over the Vonage router's settings, and when I turn off the DHCP it doesn't seem to do the trick. I know enough about networking to get myself in trouble and do so regularly. :D