If you wanna create your own Drive using your Folder follow these steps :

1)Go to C: drive.

2)Create a new folder ( say samp1 )

3)Now go to command prompt and type -

subst z: c:\samp1

4)Now go to my computer and check it..........



If you want to remove this drive follow these step :

1)Go to command prompt and type

subst z: /d


it might be old.. but
Not every One knows it...