WordPress Plugin Integration & Functionality (quick job)

Please only apply if you are highly competent with WordPress & plugins.
I have created a new website using a high quality purchased theme. The theme supports most Plugins. Although I have created (non-Wordpress ) websites myself, I do not have the time to do figure this out myself.

This small project calls for a set of thumbnail images displayed in a sidebar. When the user clicks on a thumbnail a lightbox shouyld appear overlaying the page - displays the full-size image and then allows the user to click 'next' or 'previous' image in the series (Gallery).
This function must be achieved using the PrettyPhoto (or suitable alternative) plugin in conjunction with minimal coding.
(It's trickier than you might think!)

Also - a contact form on the site that uses the (Contact7 plugin) does not currently function and therefore requires a fix. An alternative forms plugin can be applied if you know of a better one.
If you can provide a fast and low cost solution there may be further work.