First, if you have two comps, wouldn't it be better if just one ran LW?
And second, I think you should put a little less bandwidth for each since each comp because you'll be using twice the normal bandwidth dedicated to Gnutella messages (I'm not too sure since I have never used LW on two computers sharing the same connection)

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

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