Change buttons in a design (Existing template)

Hi Experts,

I have this new designed site from Photoshop i’ve made. I just made one big mistake, edited it, and made an iframe which isn’t good when hoping for searches on google.

Therefore I started to play with WordPress, but I can’t figure out how to use it. I found this template I really want to use, and I would like to change some stuff on it, to make it a bit more personal.

You can see it here;
http://jinsonathemes.com/fabs/?themedemo=Nomad
And download it here; http://topwpthemes.com/ (Name “Nomad”).

The Buttons I would like to use is from my existing design which you can find here (The ones in the top (Red, blue and so on);
http://www.ska-dan.dk
Downloadable PSD file: http://www.ska-dan.dk/Backup/index_PSD.psd

What I wish is, that I can change the existing top buttons to the ones I have in my own design, and then still keep the drop down, so I can make subpages as well. I just need the color to be canged so it matches, and I still have the possibility to make even more buttons, like I can do in the template.

Is there anyone who easily can fix this?

Thank you so much…