OSCommerce Changes

Hello I have an OSCommerce store I need the following changes: a) I want all product images to be made bigger i.e. all thumbnails on home, category listing pages b) I have the special offers on the home page at the moment but they go down vertically. I want 3 or 4 random specials to be displayed in a horizontal box so it fits on the page properly. c) Delivery at the moment is flat rate and free over £50.00 for all countries I want the country list changing so it only has the following and delivery is: England - flat rate of £5 and free over £50 Scotland - flat rate of £5 and free over £50 Wales - flat rate of £5 and free over £50 Northern Ireland - flat rate of £20 Republic of Ireland - flat rate of £30 Shouldn't take too long I imagine - please post turnaround time and OSCommerce experience