Got the installer working. Fixed a few bugs including a nasty-to-debug issue where the lang_id was being hardcoded during installation, resulting in strings being inserted with the wrong lang_id causing an infinfinite loop with fetch() throwing a "no strings" error and using template (which calls fetch()) to complain
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>{#table_dlg.row_title}</title>
<script type="text/javascript" src="../../tiny_mce_popup.js"></script>
<script type="text/javascript" src="../../utils/mctabs.js"></script>
<script type="text/javascript" src="../../utils/form_utils.js"></script>
<script type="text/javascript" src="../../utils/editable_selects.js"></script>
<script type="text/javascript" src="js/row.js"></script>
<link href="css/row.css" rel="stylesheet" type="text/css" />
<base target="_self" />
</head>
<body id="tablerow" style="display: none">
<form onsubmit="updateAction();return false;">
<div class="tabs">
<ul>
<li id="general_tab" class="current"><span><a href="javascript:mcTabs.displayTab('general_tab','general_panel');" onmousedown="return false;">{#table_dlg.general_tab}</a></span></li>
<li id="advanced_tab"><span><a href="javascript:mcTabs.displayTab('advanced_tab','advanced_panel');" onmousedown="return false;">{#table_dlg.advanced_tab}</a></span></li>
</ul>
</div>
<div class="panel_wrapper">
<div id="general_panel" class="panel current">
<fieldset>
<legend>{#table_dlg.general_props}</legend>
<table border="0" cellpadding="4" cellspacing="0">
<tr>
<td><label for="rowtype">{#table_dlg.rowtype}</label></td>
<td class="col2">
<select id="rowtype" name="rowtype" class="mceFocus">
<option value="thead">{#table_dlg.thead}</option>
<option value="tbody">{#table_dlg.tbody}</option>
<option value="tfoot">{#table_dlg.tfoot}</option>
</select>
</td>
</tr>
<tr>
<td><label for="align">{#table_dlg.align}</label></td>
<td class="col2">
<select id="align" name="align">
<option value="">{#not_set}</option>
<option value="center">{#table_dlg.align_middle}</option>
<option value="left">{#table_dlg.align_left}</option>
<option value="right">{#table_dlg.align_right}</option>
</select>
</td>
</tr>
<tr>
<td><label for="valign">{#table_dlg.valign}</label></td>
<td class="col2">
<select id="valign" name="valign">
<option value="">{#not_set}</option>
<option value="top">{#table_dlg.align_top}</option>
<option value="middle">{#table_dlg.align_middle}</option>
<option value="bottom">{#table_dlg.align_bottom}</option>
</select>
</td>
</tr>
<tr id="styleSelectRow">
<td><label for="class">{#class_name}</label></td>
<td class="col2">
<select id="class" name="class" class="mceEditableSelect">
<option value="" selected="selected">{#not_set}</option>
</select>
</td>
</tr>
<tr>
<td><label for="height">{#table_dlg.height}</label></td>
<td class="col2"><input name="height" type="text" id="height" value="" size="4" maxlength="4" onchange="changedSize();" /></td>
</tr>
</table>
</fieldset>
</div>
<div id="advanced_panel" class="panel">
<fieldset>
<legend>{#table_dlg.advanced_props}</legend>
<table border="0" cellpadding="0" cellspacing="4">
<tr>
<td class="column1"><label for="id">{#table_dlg.id}</label></td>
<td><input id="id" name="id" type="text" value="" style="width: 200px" /></td>
</tr>
<tr>
<td><label for="style">{#table_dlg.style}</label></td>
<td><input type="text" id="style" name="style" value="" style="width: 200px;" onchange="changedStyle();" /></td>
</tr>
<tr>
<td class="column1"><label for="dir">{#table_dlg.langdir}</label></td>
<td>
<select id="dir" name="dir" style="width: 200px">
<option value="">{#not_set}</option>
<option value="ltr">{#table_dlg.ltr}</option>
<option value="rtl">{#table_dlg.rtl}</option>
</select>
</td>
</tr>
<tr>
<td class="column1"><label for="lang">{#table_dlg.langcode}</label></td>
<td>
<input id="lang" name="lang" type="text" value="" style="width: 200px" />
</td>
</tr>
<tr>
<td class="column1"><label for="backgroundimage">{#table_dlg.bgimage}</label></td>
<td>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><input id="backgroundimage" name="backgroundimage" type="text" value="" style="width: 200px" onchange="changedBackgroundImage();" /></td>
<td id="backgroundimagebrowsercontainer"> </td>
</tr>
</table>
</td>
</tr>
<tr>
<td class="column1"><label for="bgcolor">{#table_dlg.bgcolor}</label></td>
<td>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><input id="bgcolor" name="bgcolor" type="text" value="" size="9" onchange="updateColor('bgcolor_pick','bgcolor');changedColor();" /></td>
<td id="bgcolor_pickcontainer"> </td>
</tr>
</table>
</td>
</tr>
</table>
</fieldset>
</div>
</div>
<div class="mceActionPanel">
<div>
<select id="action" name="action">
<option value="row">{#table_dlg.row_row}</option>
<option value="odd">{#table_dlg.row_odd}</option>
<option value="even">{#table_dlg.row_even}</option>
<option value="all">{#table_dlg.row_all}</option>
</select>
</div>
<div style="float: left">
<div><input type="submit" id="insert" name="insert" value="{#update}" /></div>
</div>
<div style="float: right">
<input type="button" id="cancel" name="cancel" value="{#cancel}" onclick="tinyMCEPopup.close();" />
</div>
</div>
</form>
</body>
</html>