Need help with .htaccess in order to make search engine friendly url's

Hi all,

I am stuck at the .htaccess part and I need traffic as the search engines are hardly bringing any traffic at the moment.
I read something about lazy google tap etc. , but I am not sure what to do.

My site: Link

Can someone tell me how to build/write the .htaccess file?

http://www.canadiantradingpost.ca/listings.php?category=6
then if you click an ad:
http://www.canadiantradingpost.ca/details.php?id=534

Thanks a lot.

Rick

 

So far I came up with this in my .htaccess file:

RewriteEngine On
RewriteRule ^([^/]*)\.html$ /listings.php?category=$1 [L]
RewriteRule ^([^/]*)\.html$ /details.php?id=$1 [L]

Will this do?

Thanks for your comments