It'd be fairly simple to do, for example:
$numberofrules = 4; //one less than actual
$rule[0] = "Rule one.";
$rule[1] = "Rule two.";
$rule[2] = "Rule three.";
$rule[3] = "Rule four.";
$rule[4] = "Rule five.";
package rulesforplayerjoin
{
function Gameconnection::onPlayerSpawn(%client,%otherstuff)//probably not the actual function name
{
Parent::onPlayerSpawn(%client,%otherstuff);
for(%a=0;%a<$numberofrules;%a++)
messageclient(%client,'',$rule[%a]);
}
};
activatepackage(rulesforplayerjoin);