I have a version of maemo mapper checked out from SVN. If I cd to the 'trunk' directory (which is immediately above the 'src' directory) there's file 'configure' there - if it is not there, you can run './autogen.sh' there, which will generate it. Then './configure' in the same place should work. After that 'make' should, in principle, work -- unless 'configure' complains about something missing.

However, there's also a debian/ directory there. To create a debian package you use the debian build system. If the 'configure' file is in place, then something like 'fakeroot debian/rules binary' should do configure&make. All from inside scratchbox, of course.