adding pricing function

ok i have a client that wants to use prices in a matrix ie

......width..2.........4.........6
hight
2.............£5.......£8.......£13
4.............£8.......£9.......£16
6.............£10.....£11......£18

now i have the function that grabs this data from a csv file named the same as the product and reads it into a muti dimensional array and then outputs drop down boxes for width and hight using the data on the first row and colum now the problem i am having is intergrating it into zen cart i would be happy to drop any other pricing element beacuse 90% of his products use this type of pricing. and the rest are just single items of 1 price.

so any help on where to start putting this would be great.

ps if i do get this to work i will publish it to the community as i think others might find this usefull