Accessing multiple subnets with a single (hopefully) IPsec tunnel

[Tim Donahue <tdonahue_(_at_)_haynes-group_(_dot_)_com>]

I have isakmpd running on a couple boxes, and I'd like to allow our 
remote sites access the 2 subnets in the that we have in the office.  I 
have searched the archives and the web, but all that I can find are 
articles on how to have multiple IPsec connections, as in 2 remote sites 
coming into a single vpn server.  I could probably use a larger subnet, 
but I am worried that it might introduce problems that I wouldn't see 
right away.  Does anyone have any recommendations on the best way to do 
this?

Tim Donahue