Cartweaver 3 site needs some mod's

We are looking for someone to help us with some small modifications on our website. We have a website running off cartweaver 3 powered by coldfusion. There are some modifications to the standard cartweaver system, however the core functions remain very similar if not the same. ---First thing is we have a slight issue with seo urls. I have tried to setup seo friendly urls but I think it has caused a few problems. I can send you our htaccess to show you how I have done it. ---Secondly our basket total in the header doesn’t seem to be showing items which are tax free, it is displaying everything with 20% vat added. ---Lastly we have an issue every time we upload a new picture for our front page slideshow. As it is cropped, cartweaver fails to pick up the correct url for the jpeg, it doesn’t seem to be storing the url correctly in the sql database. All quotes are welcome and if I can assist in anyway I will!!! Thanks for looking :-)