When trying to create custom tools in MicroStation PowerDraft, using the Workspace Configuration tools, I cannot access the Vector Icons tasks, tools or keyins.
The Vector Icons tools use extended capabilities for the customization of your tools and are supplied with a full installation of MicroStation. These capabilities have not been included with MicroStation PowerDraft.
The following BE Community Wiki may be of assistance with the customization of your task, tools, toolbars and menus.
http://communities.bentley.com/communities/other_communities/tsg_response_library/w/wiki/customizing-tools-and-tool-boxes-in-microstation.aspx
The help documentation supplied with MicroStation provides further detail for the Vector Icons tools.
http://docs.bentley.com/en/MicroStation/ustnhelp315.html