Icon design (monochromatic)

Hi everyone, I need 6 icons designed for a drupal web application and they should display the following actions: User account, private messages, bookmarks, moderation, shopping cart, log out. There should be 2 versions of the icons, a white one for dark backgrounds and a black one for light backgrounds. They should be crisp and with a little shadow beneath (see the first example below). To see the desired style you can have a look at these icon-sets: [login to view URL] [login to view URL] [login to view URL] Since this is for a drupal project, which has to be released under GPL2, I can't use these above iconsets for my project (you can find it at [login to view URL]). Please provide a sample how you would design the icons, so I can have a look at it. I will need more icons at the project grows, so I'm looking for somemone to work with in the future as well.