How to compile SCS src.contrib programs?

I recently compiled GRASS 4.1 and then removed the src/ directory to save space.
Now I want to use the r.in.erdas program included in the SCS directory of the
src.contrib files. Can someone tell me how I if I can compile these programs without
having to restore all src/CMD/generic/... stuff.

Thanks,

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Oliver Weatherbee | Center for Remote Sensing
oliver@earthview.cms.udel.edu | College of Marine Studies
Phone: (302) 831-4697 | University of Delaware
Fax: (302) 831-6838 | Newark, DE 19716