from what i understand, the 255 limit you're talking about is that it can only assign computers from numbers 192.168.1.(1-256)
but you can choose what the second to last number is too (the 1), mine is a 0 (linksys' default is 1, Dlink's is 0), so my local ip is 192.168.0.100, so i'm sure you can have it change from a one to a zero once you have all 256 computers connected to support more. But, everything i know about routers is from toying with it, i've never had more than 5 computers on my network at once so i never worried about it
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