I was playing a bit with that advanced search form in Magento, so i thought it would be nice touch to add it to left or right column of the store.
Unpack zip file, copy files at its appropriate place following directory structure, refresh cache to rebuild configs, layouts, blocks, and you’re on.
I left few comments in the code, thought someone may find them useful. Also be sure to copy template/sidebarsearch/advanced/sidebar.phtml and layout/sidebarsearch.xml to your current theme and modify them to suit your shop needs, since css is hardcoded in template for example. Regards.