SSIS tool for combining dimension tables into fact table

I am relatively new to SSIS, and am working on a data warehouse product. I have 4 DIM tables set and ready to go, but I am trying to load them into a fact table that takes the 4 surrogate keys, as well as two characteristics, sales-week and sales-day. 

My issue is both with the sourcing of the data from the 4 DIM tables to the FACT table, as well as calculating the two characteristics. I would normally just do this is sql studio and be done, but I am restricted to SSIS for this project.

For reference, my schema and data are as such: 

http://i46.tinypic.com/2eelqx3.png