The Magento Product feed generator will not override core Magento / Varien files during installation, you should backup your database & Magento installation files before installation and be prepared to revert incase this module has adverse effects on your system.

In the Magento Module installation archive there is an app folder - You can FTP this folder to the root of your Magento installation. Ensure var/export is writable by the web server.

Then you need to login to the magento admin section and Clear your cache by going to the System menu / Cache Management and finally refresh all cache.
ensure var/export is writable by your webserver.
You will need to customize the product feeds before you export them.





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Feed customization
A product feed is generated with an XML config comprised of 4 parts.
File definition
<feed name="Yahoo Product Feed" type="csv" filename="data.txt" delimiter=\'{tab}\' seperator=\'"\' headers="yes" store_id="1">

Exclusion Options

Selection Options

Feed Rows / Headers

Briefly We will cover some of the options

File definition
Name:
The name of the feed (arbitrary for reference only)
type:
Feed type (only supports CSV at this time)
filename:
the output filename (it will be in var/export/)
delimiter:
the delimiter needed in the csv file ({tab} or any standard character)
seperator:
*(not used at this time -- yes I know its misspelled )
headers:
yes to include a header row
store_id:
what store id to select products relative to


Exclusion options
Specific product_ids , category_ids or manufacturers to exclude products from

Selection options
Options to use when selecting the products you will output

Feed Rows / Headers
each product property can be accessed with some variant of the following

<field name="code" mapping="product_id"/> -- Will work like $_p->getProductId
<field mapping="name"/> is the same as <field same="name" mapping="name"/>
<field name="classification" mapping="text">New</field> -- Will output any text you would like
<field name="shipping-price" mapping="custom">return ($_p->getPrice() * 3.2) ;</field> -- This will allow you to output any php code the product is accessible through $_p
it requires a return and a terminating ;



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To automate feed exporting you will need to create a single or multiple cron entries.

download the additional file it can be set in your systems cron to generate the feeds as often as you want.

The file will need modifications; it is not part of the module it is a seperate addititional download.