Making a new theme to match existing site

ok what I am trying to do is get this Gallery URL = http://www.dominicanclick.com/Bonche/main.php to where I can use this template here http://www.dominicanclick.com/directory/ but when I try everything messes up can I possible get some help with it

Gallery URL = http://www.dominicanclick.com/Bonche/main.php
Gallery version = 2.3 core 1.3.0
API = Core 7.54, Module 3.9, Theme 2.6, Embed 1.5
PHP version = 5.2.5 cgi-fcgi
Webserver = Apache
Database = mysqli 5.0.67-log, lock.system=flock
Toolkits = ArchiveUpload, Exif, Getid3, LinkItemToolkit, Thumbnail, Gd
Acceleration = none/0, full/900
Operating system = Linux p3slh222.shr.phx3.secureserver.net 2.4.21-53.ELsmp #1 SMP Wed Nov 14 03:54:12 EST 2007 i686
Default theme = x_treme
gettext = enabled
Locale = en_US
Browser = Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
Rows in GalleryAccessMap table = 74
Rows in GalleryAccessSubscriberMap table = 11
Rows in GalleryUser table = 3
Rows in GalleryItem table = 6
Rows in GalleryAlbumItem table = 2
Rows in GalleryCacheMap table = 2