1. Copy the feed icon from Prosilver to YourStyle:
from: /styles/prosilver/theme/images/feed.gif
to: /styles/yourstyle/theme/images/feed.gif
2. Open the style template:
You can use Administration Control Panel:
STYLES / Themes / Edit / forumlist_body.html
3. Add the code responsible for feed icons:
Put it between lines (Line 1) and (Line 2)
(Line 1)<dt title="{forumrow.FORUM_FOLDER_IMG_ALT...
<!-- IF S_ENABLE_FEEDS and forumrow.S_FEED_ENABLED --><a class="feed-icon-forum" title="{L_FEED} - {forumrow.FORUM_NAME}" href="{U_FEED}?f={forumrow.FORUM_ID}"><img src="{T_THEME_PATH}/images/feed.gif" alt="{L_FEED} - {forumrow.FORUM_NAME}" /></a><!-- ENDIF -->
(Line 2)<!-- IF forumrow.FORUM_IMAGE...