Help me with this CSS problem, will pay $15

I have installed the infinite scroll plugin for my wordpress blog from http://www.infinite-scroll.com/ I didn't get any help from White Hat SEO section so I will pay for the help, hopefully I can get this resolved!


basically it will eliminate the next/previous button and there will be no more clicking to next page, it will display more posts as you scroll down.

But I'm not sure how to setup the following parameters in bold (basically I can't find the correct div and I can't seem to make it work):

Content CSS Selector: (The selector of the content div on the main page.) my input: #contentIndex

Post CSS Selector: The selector of the post block.

Examples:
#content > *
#content div.post
div.primary div.entry

my input: div.eachpost

Navigation Links CSS Selector: The selector of the navigation div (the one that includes the next and previous links).

my input: div.navigation_group

Previous posts CSS Selector: The selector of the previous posts (next page) A tag.

Examples:
div.navigation a:first
div.navigation a:contains(Previous)

my input: div.navigation_group a:first

you can conter my $15 as well but please be resonable

Again any help would be greatly appreciated
darkmobius

i don't have time to study that's why i'm paying -_-"