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
#text_font {width:250px;}
#text_size {width:70px;}
.mceAddSelectValue {background:#DDD;}
select, #block_text_indent, #box_width, #box_height, #box_padding_top, #box_padding_right, #box_padding_bottom, #box_padding_left {width:70px;}
#box_margin_top, #box_margin_right, #box_margin_bottom, #box_margin_left, #positioning_width, #positioning_height, #positioning_zindex {width:70px;}
#positioning_placement_top, #positioning_placement_right, #positioning_placement_bottom, #positioning_placement_left {width:70px;}
#positioning_clip_top, #positioning_clip_right, #positioning_clip_bottom, #positioning_clip_left {width:70px;}
.panel_wrapper div.current {padding-top:10px;height:230px;}
.delim {border-left:1px solid gray;}
.tdelim {border-bottom:1px solid gray;}
#block_display {width:145px;}
#list_type {width:115px;}
.disabled {background:#EEE;}