One other way is to use conditional compilation. You write a block of code that certain parts will execute if the compilation variable is one value and execute another if its a different value, etc.
VB Code:
  1. #If iCompany = 1 Then

  2.     'Blah, blah, blah...

  3. #Else If iCompany = 2 Then

  4.     'Blah, blah, blah...

  5. #Else

  6.     'Blah, blah, blah...

  7. #End If
You can declare the compilation variable in the project properties under the Make tab - Conditional Compilation Arguments: