I have multiple ibdata files : What should I do with them?

Question

I have 3 different ibdata files on disk. What is the difference between them? Can I remove some of them? The goal is to migrate the files from C: to E:...

I'm on MySQL 5.0.x...

Directory of C:\MySQL Datafiles

11/19/2012  12:05 PM       287,309,824 ibdata1
               1 File(s)    287,309,824 bytes

Directory of C:\Program Files\MySQL\Enterprise\Monitor\mysql\data

11/19/2012  12:05 PM     6,561,988,608 ibdata1
               1 File(s)  6,561,988,608 bytes

Directory of C:\Program Files\MySQL\MySQL Server 5.0\data

02/08/2008  09:00 AM        10,485,760 ibdata1
               1 File(s)     10,485,760 bytes