SQL Books online gives the following syntax to rename objects in T-SQL:
sp_rename [@objname =] 'object_name',
[@newname =] 'new_name'
[, [@objtype =] 'object_type']
object_name-> Current name of the object
new_name-> new name for the object
object_type -> Says wether you are renaming a column or object. For your purposes, this can be ignored.
Matt