Prestashop Custom Work

Hello everybody, I am looking for someone who is able to code me some extra functionality or a module for prestashop which can handle the following requirements: Lets say customer wants to buy a product whose price is calculated by a multi dimensional input like "width" and "height" >> 1. An extra input field on product page where customer can input a value of width of the desired product 2. A second input field where customer can input a vlaue of height of the desired product 3. In step 3 the customer is beeing asked if he wishes an extra custom work from a dropdownmenu 4. Alle these options result in the end calculation of the price of the product (price chaning accordingly to the changes customer makes) 5. Customer can set the number of items he wants (standard function in prestashop) and ad product into shopping cart It would be very great when the customer could be guided through these single steps by something like a step-by-step wizard whicht is asking for the desired width of the product in step 1 (when customer inputs a wrong value there shuld appear a error-message width guidance how to input a right value) and then asking for the desired lenght in step 2 and then asking for some extras in step 3 and so on. If anyone can handle this kind of custom work please give me a quote. Payment will be done very fast and easy...but only if everything works like a charm :) Best regards XPEPPER