couple questions...

[Rakarei55555]

how do make a unit move, like in a mini cut scene before a scenario?
and how do i make the screen shake?

[solsword]

http://www.wesnoth.org/macro-reference.xhtml

Specifically, the MOVE_UNIT and QUAKE macros (there's also EARTHQUAKE...). If you just want screen-shaking, look at how those macros do it.

Note that the MOVE_UNIT macro will break if the destination has a unit on it already. There should be a fixed version of that macro somewhere in the useful macros wiki pages.

[zookeeper]

Note that the MOVE_UNIT macro will break if the destination has a unit on it already.

Not really, the unit will simply move to a free adjacent hex instead.

[Anonymissimus]

Note that the MOVE_UNIT macro will break if the destination has a unit on it already.

Not really, the unit will simply move to a free adjacent hex instead.

Though,
-the unit image will move to the occupied location and then jump to the free hex,
-the free hex will not be analyzed for suitable terrain and
-trying to move a unit that doesn't exist (but could, because it has been killed) will cause an error.