I've made it so that it's very easy to install. Takes about 10 minutes if you know what your doing.
You don't need to know phpmyadmin.
You do need to know how to:
add new language variables to your store through the admin section
upload the files provided to the proper directories
Open and edit php and tpl files according to the instructions provided. There are only 4 or 5 files that need editing depending on the version.
Here's a sample of the type of editing you need to do:
FIND:
Code:
if ($mode == "checkout" || $mode == "auth") {
#
# Calculate total number of checkout process steps
#
After Add:
Code:
$smarty->assign("mode",$mode);