Underworld: Evolution - Some questions...

My questions regarding the film:

The original lycans were unable to revert to human shape. Later they could only turn into a wolf by the light of the full moon; later still they learned to shape shift at will. What happened and how?

What was the time frame / line of all the events?

If Alexander Corvinus was a warlord during the fifth century anno domini, when were his sons born?

How long were they alive before they were bitten and changed?

When was Viktor made immortal?

How long did it take to track down and capture William?

If William was captured in 1206, why did they wait about two hundred years to build a dungeon to hold him?

Where was he kept in the meantime?

How long was Lucian amassing his army when Kraven supposedly killed him?

How did Amelia become a vampire, and why? What role did she have in the grand scheme of things?

BTW: The DVD comes out June 7 or thereabout.