Add ons for OScommerce

Need the following adjustment to my site [login to view URL] 1. Input logo ( Will be provided) 2. Change color tone for site ( Red to Green) 3. For each product, increase the number of pictures able to be uploaded ( Currently only 1 picture can be display for each product) 4. Better picture display. Currently, some product picture looks out of shape. 5. To enable longer Title Display and Product model for each product.. ( Example Title Display ; Ni-CD rechargeable battery AAA 1.5V 2600mAH for Sony PSP.) ( Example Product Model : AP 01234567891011 (up to 18) 6. Able to increase the weight of product to 4 significant figure. (currently, maximum weight allowed is 999 gram, I need to increase to 9999 gram ( 4 significant figure). 7 About us page. Want to add a page to do a write up about our company. 8. Increase the display column to 3 columns