Can I add another path to the current search directory?
I can call another script with source("file1.R") and another script in another "sibling" folder with source("..\\otherdir\\file2.R).
I think of something like "addwd("..\\otherdir\\")" to call file2.R with source("file2.R").
I don't think this would lead to too much ambiguity since the working directory is always chosen first.