function syncWait(who)
	local USAGE =	"sync:'waiting for group chars'		syncWait()\n"..
			"sync:'waiting for one char'		syncWait(\"char1\")\n"..
			"sync:'waiting for a couple of chars' 	syncWait({\"char1\",\"char2\"[,\"char3\"..]})\n"
	local CACHE_PATH = getExecutionPath() .."/cache/"
	local CACHE_PATH_DOS = "scripts\\rom\\cache\\"

	if who == nil then
		who = {}
		for i=1,5 do
			table.insert(who, GetPartyMemberName(i));
		end
	elseif type(who) == "table" then
		for i,v in pairs(who) do
			if type(v) ~= "string" then
				print("wrong value argument "..i.."\n")
				print(USAGE) return false
			end
		end
	elseif 	type(who) == "string" then
			who = {who}
	else
		print(USAGE) return false
	end
	if who[1] == nil then
		printf("sync:I'm alone o_O\n") return false
	end
	--add yourself	
	table.insert(who,player.Name)
	--first part
 	local temp = io.open(CACHE_PATH..player.Name..".rdy", "r")
	if not temp then
		os.execute("echo 1 > "..CACHE_PATH_DOS..player.Name..".rdy");	
	else
		io.close(temp)
	end
	--check if all chars ready
	local all = true	
	for i,v in pairs(who) do
		local temp = io.open(CACHE_PATH..v..".rdy", "r")
		all = all and temp
		if temp then io.close(temp) end
	end
	if all then
		--second part				
		os.execute("echo 1 > "..CACHE_PATH_DOS..player.Name..".qit");
		--check if all chars receipted
		for i,v in pairs(who) do
			local temp = io.open(CACHE_PATH..v..".qit", "r")
			all = all and temp
			if temp then io.close(temp) end
		end
		--then cleanup
		if all then
			for i,v in pairs(who) do
				os.remove(CACHE_PATH_DOS..v..".rdy")
				os.remove(CACHE_PATH_DOS..v..".qit")
			end	
		end
		return true
	else
		return false
	end
end

function syncReset()
	local CACHE_PATH_DOS = "scripts\\rom\\cache\\"
	os.remove(CACHE_PATH_DOS..player.Name..".rdy")
	os.remove(CACHE_PATH_DOS..player.Name..".qit")
end