Connect to the remote windows file share

Hi all, 

In my workflow I need to read lists of files form the remote computers. Problem is - I have to connect to them under a different user. So what would be the best way to make it happen?

So far I can first log in to each of the computers with windows explorer, enter username/password and  check the "remember my credentials" box. Workflow will work for some time untill I am logged out of the computers again. 

Is there a way to improve this process without mounting all the remote shares as network  drives?