Move the files to shell directory of your magento installation.
In the export_attribute_set.php file
$attributeSetNames = array(
'Default'
);Add the attribute set that u need to export
To Export run the script
php export_attribute_set.php
It will create three csv files "importAttributeSet.csv" "importAttribute.csv" "product.csv"
To Import Arrtibute and Attribute set
php import.php
To Import Product use magmi
To increase the import performace and also to fully support magmi run
php split_products.php
This will split the product csv into smaller chunks of csv (count of 500 per file) and then modifies the files to support magmi