Hypermail - NT conversion

I posted this request once before, and got a response, but I lost the 
dang thing.  If anyone has any insight, help would be greatly 
appreciated (again).

I will be migrating a website from a Linux system to NT, including 
about 70 hypermail mailing lists.  What is the best/easiest way to do 
this, and what is the best software to use?  I am looking into 
Mhonarc, but any other suggestions are welcome.

Cameron