Providing parameters for iwconfig?

[Bret Mogilefsky <mogul-networkmanager gelatinous com>]

Hello,

I have an ipw2100-based interface.  The driver supports power management 
which extends the battery life on my laptop.  It's off by default, and 
to turn it on I need to do "iwconfig eth1 power on".

In the case of ifup/ifdown, I would just put
	IWCONFIG="power on"

...in ifcfg-eth1 and be done with it.  Reading around on the net, I see 
that NetworkManager does not use existing ifup/ifdown scripts, and I 
understand why.  However, where would I put extra configuration that I 
want NetworkManager to set for my wireless interface?

Thanks in advance,
Bret