Little help needed (Math, IsoGrid)

Hi, in this example I want to make 8 way mouse controlled movement based in the grid. But I cant find the good way how to tell MMF (just from the mouse coordination) which of the 8 nearest cells should use. In this file you can see my method using Sin, Cos -its bad, non-accurate and cause a lot of problems but I did just to example what I need to do. I need only nearest cell (its step-by-step movement in exact straight lines). Thank you for any help

Extensions needed:
Angle Calculator
Iso Grid

Here ya go... changed from the angle calculator to the advanced direction object...

Thank you, it looks very promising :) Could you explain to me why there are numbers 24 and 48? Thank you!

Because it's isometric, every square is 64x32 pixels.. You could just use 30 for both if you like but I find this better ;)