I've got a lot of dead spools of CAT5 at work(no more than 30'on a spool)and I was wondering if I'd be able to use this cable to connect all of the systems in my home together using a HUB?

I'd also like to know whether I could just use the CAT5 cable to just connect two computers together using SMC 10/100 NICs.

Any help would be appreciated, thanks in advance