Build-your-own site for web hosting plans

i need a script (with no backend, just a little explanation of usage)in which website user can build their own web hosting plan. 1st step: choose domain name (display price & add it to the cart) 2nd step: configure web hosting plan -> choose features with price for all features and add price to finaly price (webspace, bandwith, email, mysql databases and some more) 3rd step: offer other domains (dont need to look up avaliability if its a big work) 4th step: display cart with final cart and offer checkout with (2checkout) or without (just send a mail to me, and to the customer) paying i want something like this [login to view URL], but much more simple :) sorryy for my bad english :) Alex