Bug fixes for highly modded OS Commerce with Multistore

I need a skilled PHP programmer with experience in OSCommerce to make some fixes / changes to a HIGHLY MODDED oscommerce installation with multi stores mod. The following fixes and additions need to be made: - Store specific inactive products show up when selecting a manufacturer or when doing a search. This should be fixed. - When creating specials (also store specific), it should be able to make them attribute-specific. So for example Product A is a special and is $10 instead of $15, but the product has 4 flavours and 2 sizes. The larger size (defined in the attributes) should not have a discount price. This functionality has to be added. - Please limit the amount of specials that can be added to a maximum of 6. - Remove the "preview" page when adding a product. - The attribute manager used to have a prefix field, this is no longer used but sometimes shows the following error: 1048 - Column 'price_prefix' cannot be null insert into products_attributes (products_id, options_id, options_values_id, options_values_price, sku, price_prefix) values ('2323', '7', '463', '25.0000', 'IT000C', null) [TEP STOP] These should all be small changes, and I would like them to be done asap. I'm looking for a reliable, skilled person to work with on long term who has good English communication skills and is available per mail and IM. I'll be providing all the files and a database dump, and would like to see it working on a staging environment and get the modified files sent by e-mail with detailed instructions on how to make the adjustments on the live server. The server will run on PHP 5.2.6 with MySQL 5.0.45 Thanks!