[MerryDeer]

What do this part:

pname[0] = toupper(pname[0]);
for(new x=1; x<maxname; x++)
{
if(pname[x] == '_') pname[x+1] = toupper(pname[x+1]);
else if(pname[x] != '_' && pname[x-1] != '_') pname[x] = tolower(pname[x]);
}
SetPlayerName(playerid, "New_Name");
SetPlayerName(playerid, pname);