The answer to both in 7.5.6 is yes. You just have to edit the styles or download a new one. to get the alternating row color. For the icons you just need a new image and put it in /images/general/default/nonewposts.gif (and newposts.gif) Most people create a copy of /images/general/default/* and change the style to use that folder so when you do a upgrade you do not lose the custom image (like I have done twice
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