Yes, you can set the PHP version you'd like your different package types to be provisioned with. To set this, firstly head to Reseller Management > Configure Types. You can set the default PHP version on a per-package type basis, just select Options > Edit on the package type you'd like to set the PHP version on and head to the section (near the bottom) entitled Default PHP Version. Select the default PHP version you'd like to be used on this package type and select Save Changes. When a new package is created using the package type you've edited the default PHP version will be what you've just set.