Seeking talented OpenCart Developer

We have an by now existing OpenCart 1.5.1 site that wants some updates.

a) We have a core file that is generating dumps which needs to be resolved.

b) There is a problem with the the database not loading completely and dropping product options which needs further troubleshooting should this not be corrected by the core file issue mentioned above.

c) Our confirmation receipt that gets sent to our customer is no longer being generated. This must be corrected.

d) Relatively simple code changes are required on various products (both existing and to be added in the future) under some category headings, but not under all.

e) We want an image added to most product pages.

f) We wish to make the checkout process smoother by removing use voucher and default the checkout option to New Customer - Guest Checkout. All references to Login and Create an Account should be removed.

g) Our Related Products isn't functioning and need be fixed to allow addition and deleting of related products.

Desired Skills are MySQL Administration, HTML, PHP, OpenCart