Using gcc 4.1.2 port to build gcc 4.1.1?

[Michael Brian Bentley]

How easy would it be for me to adopt the 4.1.2 port in order to build 
gcc 4.1.1? I have a project that causes an internal compiler error to 
crop up in 4.1.2, but I'm told that we use gcc 4.1.1 to build 
everything on the linux boxes, so I'm curious to see what happens 
with a 4.1.1. I haven't yet looked at how port scripts are put 
together; is there some written-on napkins with hints stuffed into a 
directory somewhere?

I'll try doing the build with gcc42 shortly in any case just to see 
what happens.

-Mike