Help with Single Page Portfolio

[snooze]

unless the theme itself has other configuration options

Must be the case here. Put the files alone the in folder and the theme does not even show up on the drop down list.

This theme has the following file structure:

data
i18n_gallery
gallery.xml
slider.xml
works.xml
other
components.xml
plugins.xml
pages
about.xml
contact.xml
index.xml
works.xml
thumbs
images
thumbnail.me.gif
thumbsm.me.gif
slider
8 - i18npics
uploads
images
me.gif
slider
1.jpg
2.jpg
3.jpg
4.jpg
5.jpg
plugins
i18n_common, i118n_gallery & po1-contact (all apparently complete)
theme
single-page-portfolio
usual files, css, functions, etc.

Placing the theme folder alone in the usual place shows the skeleton of the theme, but much is missing.

Having studie the structure more closely, I see that there are certain files that already exist. Should I overwrite theme or is there another method that acts more like a child theme? Also, my thinking on the other plugins is to install them from individual downloads in order to take advantage of latest updates.

Still scratching my head.