What is it your stuck on ?
First you must decide what name is of folder structure in P: drive and if you shall use
P:\Namespace \your_new_island
or direct to P
P:\your_new_island
then you decide how big in Arma2 you want it and how detailed you can have it ,the first decision effects the next
most are between 10 and 40 km square and consist of wither 10m cells and 20 meter cells for the latter.
the rest is the Hard piece but its easier after first attempt
. best adice when adding objects the colour you select them to show as in visitor is critical , because you will export the image from visitor to form the base of your Mask_loc/lca ( lco 24 bit 4 colours per segment and lca 32 bit if you want extra colour for shading some areas like road edges )
the tutorials can help from there i believe a config is easy there well documented.
Your first steps will be to import the xyz to visitor then export asimage or .pbl
this will create a text document and heightmap , if the map grid was wrong open this text tdocument and look at grid size and alter it then open the .pbl and check it , then when your happy save as a .pew and begin the journey