SPD policy document/article

[Lokesh <lokeshnb@intotoinc.com>]

Hi,
I'm looking for a document or article where a SPD policy's all complexities 
and intricacies are
explained better in detail. If there is one please let me know the link.
Basically, I'm looking for configuration and behavior of SPD and 
IPSec  that generate
1] mutiple SA Bundles in a policy
2] configuration of SPD policy that generate SA Bundles containing SAs 
terminating at different tunnel
     end points etc ..
3] IPsec operation and policy configuration for Road worrier case.

Thanks in Advance
Lokesh