No unfortunatley the screen saver features the phone comes with can't be changed yet, there is another thread on here about this same request but worded differently. The phone would have to be first be hacked properly, so we can change the default screen saver pictures. No luck yet. There are a few of us that are currently researching the inner hidden capabilities this phone has, and see how many of these request could be fufilled. Unfortunately you would need to hold on tight until we have hacked this phone. No worries, a manual and step by step discoveries will always be posted on this forum's threads for the phone community could access themselves if so desired. Hope this cleared up you question.
