[GD-Windows] LAN network throttling to simulate a modem?

[Ivan-Assen I. <as...@ha...>]

We're hunting down some nasty and rare problems in our netcode
which only happen over slow, congested connections.
Buying a bunch of modems and dialing an ISP over our
telephone exchange is an option, but seems like a major PITA.

Have you heard about some kind of software that throttles down
your LAN connection speed, drops packets etc.?

I have found something called NISTNet which runs on Linux,
and I understand the *BSD kernels can do this natively. Does
anyone know of a Windows solution?

Thanks,
Assen