My Question: When running 4-5 copies of wow on one system, does minimizing cut down on CPU usage?

PS: I'd love to just try it and see, but between work and my sister-in-law's wedding it will be at least sunday before i can test.

More detail for anyone that wants it:

Video: Nvidia GeForce7900 gs 256mb
CPU: AMD Athlon 64 3800+ (2.39GHz, 2GB ram) - Will upgrade to dual-core on christmass
Display: Dell 24' Widescreen at 1920x1200

I run 4 accounts, using Maximizer I get one with 1920x600 resolution on the top half of my screen, and 3 running at 640x600 on the bottom half of the screen.

My processor hits 95% - 100% with 2 copies of wow running. Clearly my processor is the biggest bottleneck.

I get ~25fps on my main, and ~10fps on my clones. (sound off on clones, and graphics all the way down on all except for the mains distance viewing)

I find this acceptable (I'm doing PVE), but worse would be bad...

Today my wife surprised me with a 5th copy of wow (how I ended up with a wife that not only puts up with me, but actually picks up another copy of wow for me, without me even mentioning it I'll never know [my second account was her account, she rarely plays anymore, but does have a 70 warrior])

I really want to start a full 5 man group (thinking 1xpally, 4xpriest) but I'm already killing my computer...

Would running all except the main minimized help cup CPU usage? I really would rather not bring another computer into the picture, but will if I don't have any other choice.