movement in copy/scrollback mode

[bill]

Is it possible to get the 'f' and 'F' cursor movement keys in 
copy/scrollback mode?  I've been glancing through the source for all of 
15 minutes, and it doesn't appear to be a trivial thing to add.  Can 
anyone familiar with the code gauge the difficulty of adding that 
functionality?  I'd hate to have my first dive into the source be overly 
frustrating.