Kevin: I don't believe that you are required to perform an interview at VMI either as a first time student or as a transferring student. As an informational tool for both you and VMI, alumni frequently give interviews to prospective cadets- a link to where you can find them is below.
http://www.vmi.edu/Admissions.aspx?id=13641&ekmensel=fb5d653b_20_0_13641_11
Alumni interviews are a pretty good way to give a personal picture of life at VMI and answer questions like: "what is the daily schedule?" "what will happen during the Rat line and what should I expect" etc...- but it generally won't give you detailed admissions specific questions like: "will this course get transferred"? and the person doing the interview is not making any of the acceptance decisions beyond providing a summary of the interview to the admissions office.
If you haven't seen it- Below is a guide for transfer students and policies:
http://www.vmi.edu/Admissions.aspx?id=226&ekmensel=fb5d653b_20_0_226_4
If you have specific questions or concerns about your application for transfer
I would suggest that you contact the VMI admissions office directly. They are pretty approachable- I believe that LTC Neil Whitmore is the admissions officer responsible for transfer students: The number is (540) 464-7211.
If you have ROTC specific questions - you will need to contact those departments directly- this link will give you the contact information for all of the services and from there you can either call them directly or search yourself.
http://www.vmi.edu/show.aspx?tid=36579&id=1322&ekmensel=8f9c37c3_66_0_1322_3
Hope this helps you some. Good luck and hope to see you at VMI next August. I will be the old grad muttering that " Things were so much harder back in the Old Corps" but it won't be true- I'll just be trying to put my Cadet in his proper place!