Usability improvements:

-Added javascript to enable/disable radiobuttons
-Added labels

files/templates/admin.php

-<form action='#' method='post'>
+<script type="text/javascript">
+function switchPublicFolder()
+{
+	var publicEnable = document.forms['filesForm'].elements['publicEnable'].checked;
+	var sharingaimGroup = document.forms['filesForm'].elements['sharingaim'];
+	for(i=0;i<sharingaimGroup.length;i++) {
+		sharingaimGroup[i].disabled = !publicEnable;
+	}
+}
+</script>
+<form name="filesForm" action='#' method='post'>
 	<?php if($_['htaccessWorking']):?>
-		<?php echo $l->t( 'Maximum upload size' ); ?> <input name='maxUploadSize' value='<?php echo $_['uploadMaxFilesize'] ?>'/><br/>
+		<label for="maxUploadSize"><?php echo $l->t( 'Maximum upload size' ); ?> </label><input name='maxUploadSize' id="maxUploadSize" value='<?php echo $_['uploadMaxFilesize'] ?>'/><br/>
 	<?php endif;?>
-	<input type="checkbox" /> <?php echo $l->t( 'Allow public folders' ); ?><br>
+	<input type="checkbox" name="publicEnable" id="publicEnable" onClick="switchPublicFolder()" /><label for="publicEnable"> <?php echo $l->t( 'Allow public folders' ); ?></label><br>
 
-	<?php echo $l->t( '(if public is enabled)' ); ?><br>
-		<input type="radio" name="sharingaim" checked="checked" /> <?php echo $l->t( 'separated from webdav storage' ); ?><br>
-		<input type="radio" name="sharingaim" /> <?php echo $l->t( 'let the user decide' ); ?><br>
-		<input type="radio" name="sharingaim" /> <?php echo $l->t( 'folder "/public" in webdav storage' ); ?><br>
-	<?php echo $l->t( '(endif)' ); ?><br>
+	<div style="padding-left: 20px">
+		<input type="radio" name="sharingaim" id="separated" checked="checked" /><label for="separated"> <?php echo $l->t( 'separated from webdav storage' ); ?></label><br>
+		<input type="radio" name="sharingaim" id="userdecide" /><label for="userdecide"> <?php echo $l->t( 'let the user decide' ); ?></label><br>
+		<input type="radio" name="sharingaim" id="inwebdav" /><label for="inwebdav"> <?php echo $l->t( 'folder "/public" in webdav storage' ); ?></label>
+	</div>
 
-	<input type="checkbox" /> <?php echo $l->t( 'Allow downloading shared files' ); ?><br>
-	<input type="checkbox" /> <?php echo $l->t( 'Allow uploading in shared directory' ); ?><br>
+	<input type="checkbox" id="downloadShared" /><label for="downloadShared"> <?php echo $l->t( 'Allow downloading shared files' ); ?></label><br>
+	<input type="checkbox" id="uploadShared" /><label for="uploadShared"> <?php echo $l->t( 'Allow uploading in shared directory' ); ?></label><br>
 	<input type='submit' value='Save'/>
 </form>