You wrote:
> http://webpages.charter.net/dbarnes3367/PC/Multia/

Hello,

I just wanted to let you know that I found another firmware version 
(4.5-819) [1], installed it and now I can netboot my system.
As mentioned in the NetBSD Multia FAQ, netboot didn't work with 3.8-3. 
Firmware 3.8-2, 3.8-1 and 3.7-628 (found at [2]) won't netboot either 
(at least on my VX40).

Regards,
Andreas

[1] http://www.djesys.com/vms/hobbyist/multia.html
[2] http://www.staff.uni-mainz.de/weiss/