251046 OSCMax V2 site work

Hi I have setup an oscmax V2 site and it is running. Due to time constraints I am after someone to carry out the following tasks: A.) Resolve bug in discount/vouchers where wrong deductions being made from total. B.) Resolve bug in admin section under order total. Get a list of errors saying cant open and module not found. They appear to be linked to the voucher issue above. C.) Write and install new shipping module specifically for U.K. shipping where most carriers price by post code AND weight rather than based on just weight. Needs to recognise certain postcodes carry a premium and the premium can be different for different postcodes. If the postcode is not in its list of special ones then it treats it as a standard one. D.) Create extra shipping category for Royal Mail Special Delivery. Thanks Matt