preloadでブロックが作れますね

<?php

class PreloadBlock extends XCube_ActionFilter
{
	protected $index = 'l';
	protected $block = array(
		'id'      => -1,
		'name'    => 'preload_block',
		'title'   => 'プリロードブロック',
		'content' => '<i>ブロックの内容</i>',
		'weight'  => -1, // 並び順
	);
	protected $indexes = array(
		'l' => 0,
		'r' => 1,
		'cl' => 3,
		'cr' => 4,
		'cc' => 5
	);
	protected $blocks = array(
		'l' => 'xoops_lblocks',
		'r' => 'xoops_rblocks',
		'cl' => 'xoops_clblocks',
		'cr' => 'xoops_crblocks',
		'cc' => 'xoops_ccblocks'
	);

	public function postFilter()
	{
		if ( $this->mController->_mStrategy->mStatusFlag != LEGACY_CONTROLLER_STATE_PUBLIC )
		{
			return;
		}

		$this->mRoot->mDelegateManager->add('Legacy_RenderSystem.BeginRender', array(&$this, 'beginRender'));
		$this->mRoot->mContext->mAttributes['legacy_BlockShowFlags'][$this->indexes[$this->index]]  = true;
		$this->mRoot->mContext->mAttributes['legacy_BlockContents'][$this->indexes[$this->index]][] = $this->block;
	}

	protected function beginRender(&$tpl)
	{
		if ( !empty($tpl->_tpl_vars['isFileTheme']) )
		{
			uasort($tpl->_tpl_vars[$this->blocks[$this->index]], array(&$this, 'reOrder'));
		}
	}

	protected function reOrder($a, $b)
	{
		if ($a['weight'] == $b['weight'])
		{
			return 0;
		}
		return $a['weight'] > $b['weight'] ? 1 : -1;
	}
}

?>