i have repeatedly asked about DHCP and TAP configs, but have found little help. I am not the only one to have issues getting it working, but sadly i still cant get it working. i found the below link, and it hasn't helped me very much. maybe you will fare better than i.
http://hans.fugal.net/blog/2009/01/06/putting-openvpn-in-its-place/
i constantly get the error:
MULTI: no dynamic or static remote --ifconfig address is available for ...
it does not matter what combination of server-bridge directives i give.