用于访问Project Server Web服务的MS CRM Custom Workflow

I am trying to create a custom workflow in ms crm 4 so that when a task is completed it will take some of the attributes of the task and add an entry in project server on a timesheet. I am able to access the project server web services (PSI) and create a time sheet entry from a c# console app and I can do other custom workflows in crm not related to project server. When using the Project Server web services (PSI) I have to reference and include 3 office project dll's but I am unsure how to get those registered in CRM when i do the custom workflow plugin registration. Any thoughts would be helpful.I am trying to create a custom workflow in ms c