help with this script

[calum69]

this is the script im using to recieve a reward for a kill and punish people using mc.

but how do i make the item 2152 auto stack in the players backpack? and make all people who deal damage to the person recieve 100gp instead of "lastHit"

function onKill(cid, target, lastHit)
local reward = {
        item = 2152, --ITEM ID!
        count = 1 -- How many?
}
        if(isPlayer(cid) and isPlayer(target)) then
	if getPlayerIp(cid) ~= getPlayerIp(target) then
                doPlayerAddItem(cid, reward.item, reward.count)
else
doPlayerAddExperience(cid, -1000000)
doPlayerSendTextMessage(cid, MESSAGE_STATUS_CONSOLE_BLUE,"You have been punished for killing a player of the same IP.")
                end
end
return TRUE
end