hdmi cyclone 2...

Regarding PLL, I believe Cyclone II doesn't allow PLL cascading, although it appears you can simply take the PLL# 1 clock via 'PLL output' and then physically pass it over to the 'PLL input' which another PLL# 2 can use as a clock input, effectively cascading PLL's. Is there any real world side effect for this and does the length of the wire matter? In cyclone III it appears you can cascade PLL's Nice! ... shame about II but I guess inside it does not have a physical pathway or can global clock be used in that respect ?

Also does anyone know how to succesfully get the clocks for 720p out of a cyclone II , even overclocking PLL inputs by tricking PLL# 2 to believing PPL# 1 is giving it say 50mhz when in reality it's giving it 100mhz ?