as long as you have component hookups use those to connect everything. For the PS3 however I don't know if that will work since 1080P only works with HDMI.
Honestly with that TV you might want seriously consider upgrading your receiver to take advantage of your PS3. Great price on onkyo SR606 for around 300 right now.
i have and old technics receiver about 10 years old . can i hook this up to my new samsung lcd650 model and cable box and my ps3 without losing anything, do i have to purchace a new receiver. any imput is helpful thanks joe email@example.com