Customization of Wordpress theme

Hello, I would like to use a premium Wordpress theme I have just bought, but it is necessary to customize it so that it gets to be similar to my current theme. My blog is at [login to view URL] and the premium theme I want to use is this: [login to view URL] Please look at both my current and my intended themes to spot how much time will be necessary to make the changes. Some details I will want different between both themes, but 90% of the look should be the same. I dont mean changes in the structure and CSS of the premium theme, I just mean the location of the resources on the screen, so it should not be very difficult stuff.