Help: How to connect my stuff?

I have a Yamaha HT5280 5.1 receiver, toshiba sd5109 DVD player, a pair of Paradigm studio 60 and a pair of Paradigm studio 20 and paradigm studio CC. Recently I got Adcom GFP-565 preamplifier, Rotel RCD-961 CD Player and Rotel RB-990 amplifier. As Rotel RB-990 is only a 2 channels amplifier, I want to use it to drive Paradigm studio 60 front speakers. However I still need Yamaha HT5280 to drive other speakers. What's the best way to hook all of them to get both DVD and best CD music playing?

Question 1: can I hook front speaker line out of Yamaha HT5280 to Adcom GFP-565 preamplifier and then to Rotel RB-990 amplifier?

Question 2: supposed I can do question 1, which one is better, hooking Rotel RCD-961 CD Player directly to Adcom GFP-565 preamplifier or first to Yamaha HT5280 and to Adcom GFP-565 preamplifier?

Thanks,
Wenqing