Suggestions on Multi-Com LAN World Server

[Velenos]

OK, I've got one tech question and a few requested suggestions from the experienced world hosting people at EQEmu

1, What's the setup I need to run:
(A) World & Zones on CompA,
(B) +Zones on CompB?

and 2,
What's your guys recommendations on number of zone servers to host on each computer?
CompA - 950MHz, 480MB SDRAM (Exclusive Host)
CompB - 1.3GHz, 512MB SDRAM, 64MB VRAM...
Hosted on 3.2Mb DSL ~ 1000 ft from telephone co.
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I came to the realization that my server setup needed revision when this afternoon my user population started gettin close to 20, all my zone server's on CompA were full (only hosting 10 at the time), i shut down after a while, opened up more zone servers and started lagging pretty badly.

Any tips, guys?
-Skin
<Protectors>
*Server OP* Gnome Kabob Server