VbScript - Update Users with Tab Delimited Input File

I am trying to write a script that will accept a tab or comma delimited text file as input. I need to update about 1000 users in Active Directory and the text file would contain:

User Name, Description Update, Telephone Update
Next Users, Description Update, Telephone Update
etc.

I would basically just need to pull each line and then run it through a loop that updates the user's account with this new information. I've written many before where I would have a text file as input and a user per line, but never one where I had multiple columns. Can anyone give me a quick breakdown of how this is done? I've searched for examples on the web but can't find anything that relates to what I am doing.

Thanks in advance, greatly appreciated.