for use this script create a new document.txt now dit it and write that:
//Set Builder
var
i:integer;
begin
if FromServer then if pck[1]=#$04 then
begin
i:=22;
ReadS(i);
i:=i+328;
buf:=pck;
WriteD(1,i);
pck:=buf;
end;
end.
now close and save the modifications. if you want to use it with hlapex just change the name of the document
document.txt to document.pas and copy it in to your hlapex in data scripts
now if you want to use it with l2Phx just put document.txt in your l2Phx folder in scripts section then run the scrip
and voila you are gm.