what do you mean it loads slow? it loaded fine on my pc, it took a couple seconds but I would consider it 'slow'.
A couple things that might speed your site up:
Simple image folder location, right now I see you have
CODE
./mkportal/templates/Forum/images/atb_racconti.gif
Why not just change it to
CODE
Forum/images/atb_racconti.gif
Also you want to create web optimized graphics, gif is good because it supports transparency and animation, but if its just an image and doesnt need to be transparent or animated use .jpg. PNG is a good format that kind of meets in the middle of .jpg and .gif, although isn't treated the right way in several browsers.
That's really all I can think of, really the image thing would slow the site down more than the folder, the folder probally doesn't even have a noticeable effect.
From my end you site loaded fine I wouldn't worry to much,
Kevin DiGennaro