need to change database but need help

I have no knowledge in databases so sorry if this is hard to understand.

I have a fb script that use's the calls "user" but i need it to call "users"
Also in users i need it to update "userid" and "points" but it updates "id" and "king_author_points"

Is there a easy way to modify this as i have seen some scripts just adding a line to the database and one line in the file that calls for the database
the file that calls for the functions

<?php

function Filter($txt, $nl2br=0)
{
	Connect_Database();
	if(get_magic_quotes_gpc()==1)
	{
		$enable = false;
	}
	
	else
	{
		$enable = true;
	}
	
	$string = trim($_REQUEST[$txt]);
	if($enable)
	{
		$return = mysql_real_escape_string($string);
	}
	else
	{
		$return = $string;
	}
	
	if($nl2br==1)
	{
		$return = nl2br($string);
	}
	return $return; }



function increaseEnergyForInvitation($id)
{
	$user = GetUserDataFromDB($id);
	$level = $user["level"]+1; 
	db_execute("Update user set level = '".$level."' where id = ".$id);

}
function increaseSteminaForInvitations($id,$total)
{
	$user = GetUserDataFromDB($id);
	
	$stemina = $user["stemina"] +  $total ;
	db_execute("Update user set stemina = '".$stemina."' where id = ".$id);

}
function increaseEnergyandSteminaForInvitations($id,$total)
{
	$user = GetUserDataFromDB($id);
	$energy = $user["energy"] + $total ;
	
	db_execute("Update user set energy = '".$energy."' where id = ".$id);
}

//Application Setting
function ApplicationSetting()
{
	return mysql_fetch_assoc(db_execute_return("Select * from setting where id = 1;"));
}
//Check User Exist In Database
function UserExistInDatabase($id)
{
	return db_execute_count("Select id from user where id = ".$id);
}
//Check group exist for user in database
function GroupExistForUser($user_id)
{
	return db_execute_count("Select id from user where id = ".$user_id." and group_id != 0 and social_circle_name != ''");
}

////////////////////////////////////////////////////////////////////////////////REWARD SYSTEM////////////////////////////////////////////////////
function AddRewardInDatabase($user_id, $points)
{
	db_execute("Update user set king_author_points = king_author_points+".$points." where id = ".$user_id." Limit 1;");
	db_execute("INSERT INTO `offer` (`id` ,`user_id` ,`points_earn` ,`cash_earn` ,`datetime`)VALUES (NULL , '".$user_id."', '".$points."', '".($points/10)."', '".date("Y-m-d H:i:s")."');");
}
//Offer cash for user
function OfferCashForUser($cash)
{
	global $user,$user_id, $appSetting;
	db_execute("Update user set balance = balance + ".$cash.", king_author_points = king_author_points - ".$appSetting["offer_point_for_cash"]." where id = ".$user_id." Limit 1;");
}
//Offer Heal for user
function OfferHealForUser($option)
{
	global $user,$user_id, $appSetting;
	if($option=="Energy")
	{
		db_execute("Update user set energy = energy_max, king_author_points = king_author_points - ".$appSetting["offer_point_for_heal"]." where id = ".$user_id." Limit 1;");
	}
	elseif($option=="Stemina")
	{
		db_execute("Update user set stemina = stemina_max, king_author_points = king_author_points - ".$appSetting["offer_point_for_heal"]." where id = ".$user_id." Limit 1;");
	}
	elseif($option=="Health")
	{
		db_execute("Update user set health = health_max, king_author_points = king_author_points - ".$appSetting["offer_point_for_heal"]." where id = ".$user_id." Limit 1;");
	}
	elseif($option=="Level Up")
	{
	$level = $user["level"]+1;
	//$points = $user["king_author_points"] - $appsetting["offer_point_for_level_up"];
	db_execute("Update user set level = $level, king_author_points = king_author_points - ".$appSetting["offer_point_for_level_up"]." where id = ".$user_id." Limit 1;");
	}	
}

function OfferHealLevelForUser($option)
{
global $user,$user_id, $appSetting;

	if($option=="Energy")
	{
		$energy = $user["energy_max"] + 1 ;
		db_execute("Update user set energy_max = $energy, king_author_points = king_author_points - ".$appSetting["offer_point_for_energy_up"]." where id = ".$user_id." Limit 1;");
	}
	elseif($option=="Stemina")
	{
		
		$stemina = $user["stemina_max"] + 1 ;
		db_execute("Update user set stemina_max = $stemina, king_author_points = king_author_points - ".$appSetting["offer_point_for_endurance_up"]." where id = ".$user_id." Limit 1;");
	}
	elseif($option=="Health")
	{
		
		$health = $user["health_max"] + 10 ;	
		db_execute("Update user set health_max = $health, king_author_points = king_author_points - ".$appSetting["offer_point_for_health_up"]." where id = ".$user_id." Limit 1;");
	}
}

//Offer Member for user
function OfferMemberForUser()
{
	global $user_id, $appSetting;
	db_execute("Update user set friend_count = friend_count+1, king_author_points = king_author_points - ".$appSetting["offer_point_for_member"]." where id = ".$user_id." Limit 1;");
	db_execute("INSERT INTO `friends` (`id` ,`fid1` ,`fid2` ,`status`)VALUES (NULL , '".$user_id."', '0', '1');");
}


?>

Code (markup):

Basicly database name is cpaneluser_fb it updates user "id" + "king_author_points"
[i need cpaneluser_fb it updates users "COLOR="red"]userid[/COLOR]" + "COLOR="red"]points[/COLOR]" [/COLOR]

Hope this makes scence to anyone with knowledge.

Also not that all other databse tables remain the same i have only changed the three in red above
.

many thanks


------------------

Edit...

NVM played with it a bit and got this to work Feels good when you work things out yourself ..

just need to add security @@