Subscribe Button

Hi there, this looks a great plugin.

I am hoping to enable the user to set a donation amount, choose the frequency and attach it to a subscribe button. Is there any way that you might be able to achieve this using this plugin?

Any help would be very much appreciated.

Thanks in advance,

Peter S

http://ww.wp.xz.cn/extend/plugins/paypal-pay-buy-donation-and-cart-buttons-shortcode/