I have the following code that displays all the posters belonging to the Movie Page. I'm using the same code on the Homepage as I'm using a specific function to pull in the Movie pages on the homepage. On the homepage I want to limit the number of posters to 4. I can't seem to do this any help?

<ul class="movieList">
		<% control MoviePages %>
			<li>
				<h2><a href="$Link">$Title<% if MovieVersion %> <span>($MovieVersion)</span><% end_if %></a></h2>
				<% if ReleaseDate %><p><strong>Release Date:</strong> $ReleaseDate.Nice</p><% end_if %>
				<h3>Sypnosis</h3>
				$Content				
				<h3>Posters</h3>
				<% if Posters %>
					<ul class="posters clear">
						<% control Posters(4) %>
							<li>
								<a href="<% control PosterImage %>$URL<% end_control %>" title="$Pos/$TotalItems - $PosterName" rel="$MoviePage.Title"><% control PosterImage %><img src="<% control CroppedImage(125,188) %>$URL<% end_control %>" alt="$Title Poster Thumbnail" width="<% control CroppedImage(125,188) %>$Width<% end_control %>" height="<% control CroppedImage(125,188) %>$Height<% end_control %>" /><% end_control %><span></span></a>
							</li>
						<% end_control %>
					</ul>
				<% else %>
					<h5>No Posters Yet</h5>
					<p>Do you have a poster for this movie? Please <a href="contact">send it to us</a> so we can add it to the site.</p>
				<% end_if %>
			</li>
		<% end_control %>
	</ul>

You just need to write a custom getter..

function HomePosters()
{
return $this->Posters(null, null, null, 4);
}

I tried doing this:
Homepage.php

function MoviePosters() {
		$doSet = DataObject::get(
			$callerClass = "Poster",
			$filter = "`MoviePageID` = '".$this->ID."'",
			$sort = "Sort DESC",
			$join = "",
			$limit = "0,4"
		);
		return $doSet ? $doSet : false;
	}

<% control MoviePosters %>
					test
				<% end_control %>

It doesn't produce anything.

         $filter = "`MoviePageID` = '".$this->ID."'",

MoviePages are associated with your homepage? Seems odd.