private message script bug fixes

Im looking for a service provider who can fix some bugs in a private message script that is running in an oscommerce store. This probably wont make any sence till you have saw the private message script, but this is some of the bugs needed to be fixed. If you send a message not relating to any order, the sent message has "Order #0" in the subject, this needs removed from the subject if the message is not relating to any specific order. The Private Messages between admin and the account holder should be continuious untill admin finish the conversation. The script is starting a new private message after the 2nd reply. Fix sliding message display bug. Fix table width, change some text to something else, add a back ground colour to customer side messages, add time and date message was sent. And there will be a few other bug fixes not mentioned yet. The maxiumum I will pay is $50 to fix everything, please give me your best bid. Dont bid if you have 40 other projects on the go at the same time. I will only work with you and pay you if you are going to start working immediately and you will continue to work untill all the bugs are fixed.