Need of additional features

Hi
Is it possible to ask for additional features (paid work of course)?

I need to improve few settings (for example, amount field only for specific steps), fix few problems (ex. after client clicks Add to Cart, old cart contents must be cleared) and make additional steps with custom page backgrounds (1st step – pc components, 2nd step – peripherials, 3rd step – services (assembly, delivery, extras). Would like to get suggestions for performance improvement too (3 distros import system already made, 3 more remaining, already ~3000 products in the configurator)

http://testapp.pcguru.lt/woo_product_builder/pc-builder/