Passing another,second,individual "torrc" on command line to Tor possible ?

[Ben Stover]

Can I start Tor with a second, individual "torrrc" configuration file?

In general I want to use the original torrc. But occasionally I want to use e.g. specific exit nodes.
So I must use a modified torrc. Instead of always having to manually edit the one and only torrc
I would appreciate to have a second torrc which I can pass to Tor as starting parameter on command line.

Is this possible ?
Or is there a work around for this ?

Ben