[Plugin: Quick Post Widget] Quick post widget and Custom Field

Hi, I most say this is a great editorial plugin.

I just installed quick post widget plugin and I would like to know how I can add eshop Product’s Description, Price, SKU, Stock Available, options or any other values to the Custom Fields? With the editor I would like to have those added to the Custom Field.

http://wordpress.org/extend/plugins/quick-post-widget/