[Q]Floating static routes, admin. distance and route-map

I will rephrase an earlier question I had, in the hope that someone may
know how to achieve this, and based on some reading I did, from Cisco's
web site:

I have right now a setup with two routers, using two lines connecting
them, where I have the traffic statically segregated, using a combination
of static routes and route-map rules (i.e. on one router I statically
point to a few systems on the other side, through one line, and default to
the second, while - correspondingly - I route-map the source addresses of
the hosts behind the other router, through the first line, and default the
rest through the second)

I would like to use the two lines - obviously, both active - in such a way
that if one fails, the other would "pick up" all the traffic, so - the
way I see it right now the question would be: can I combine route-mapping
and administrative distances (under the assumption that administrative
distance would take care of the traffic being segregated as I have it now,
and still provide a "failover" path, in case of one line being down)?

I would appreciate comments, or pointers to a configuration achieving the
above.

TIA,
C