DHCP server should be Enabled. As for the DNS servers, you should doublecheck with what is listed in the router settings- this is what the PS3 should match up with. You'll find this in the Status tab of the router settings.
Changing your starting address for DHCP would make that first address the new one your PC gets. You may want to adjust things back there. I was doing some digging through the manual for that model router and it doesn't look like it has a reserve IP feature- you may want to have the PS3 get its IP automatically instead.