Os Commerce Addons

I want someone to install addons to my os commerce that is contributed by the os commerce community. My os commerce website is quite customized and needs these addons to enhance my website. To build this features it would cost lot of money and time, thanks to the os commerce community, now I only need to hire someone to install it for me and may be to slight modification to suite my curruent os commerce website. The current attach files lis all the features that I wish to install in my website. Your job would be to download from the os commerce website and read the instruction and do as needed. Before I choose any bid, I would like to ask a question to screen you guys. If you were to install a feature on os commerce where I could add product attributes and stock for each attributes and minus those as customer buys it, and add it back if the customer cancles the order. your job would be to track weatehr the product is in stock or not if yes then charge that credit card if not just save the credit card into the database and mask it. In the orders this order will come as backorders and i will be able to procuess it when I change the quanity of that product to positive. I go to the admin click on backorder and it will select all the backorder product. There will be check boxes before it, I will be able to select those and process it all one at a time . How do you rate this project in the scale of 1 to 10 ? 10 being most difficult ? Please give me a breakdown cause this is mixed with two mouldes. How much time would u take to complete such and how much would u charge if you had to develope from scracth and how much if you can get scripts and u just need to do some addons and modification ? now back to the project that is up for bid. I have attached file that contails links to the addons. You need to go through the link and understand it and tell me how long it would take to install it ? There are 24 Moudles and about 12 can be installed in 1 single day in my understanding if u have similar experince. If you are trying to do hit and tryal please do not bother to bid on this.