Luiart,
I think this forum is for general questions towards the LV-community, not some selected person. But I will try to answer you.
1) You copy data by connecting the data you want to copy to an input terminal of the vi you want to copy the data to.
2) "The memory vi" is just a vi you can make for your use. It uses a shift-register to hold the data (like a 2D array). The vi has different states.
In one state you can write (add) a new data-point to the array.
In another state you can read-out data from this array (It could be all, but you could also make a selection).
3) It is wise to give this vi a thread that is not time/processor intensive.
4) I will send this later.