Item Description and adding alternate vendor/part numbers to the stock item profile

Good afternoon,

I have a couple of basic questions;

1.  Change the class on item
2.  Change/replace the existing description to a new one
3. Add Alternate vendors and part numbers to the stock item profile
4. Add weight and volume
5. Add MSRP
6. Add a data to a bunch of attributes..

I would like to do this in one import scenario.  Does anyone have template?  Or possible can lead me to how to update the class and description.  Add alternate vendors/parts is missing something?  Attached is the sample/test file.  Below is screen of the beginning scenario.

Your assistance is greatly appreciated.