Using a file index to find and open files

[HS]

Hi all
I frequently open files using recursive find.
Now I just came up w/ a ruby script to generate a list of all sources
on some given folder (and under, recursively).

My problem now is how to parse this index file and use it to open the
file I'm looking for.

file1.c = c:\blabla\prj1\file1.c
file2.c = c:\blabla\prj2\file2.c
file3.c = c:\srcs\file3.c

Anyone could give me a hint?
I'm also worried about having multiple matches...
Thanks in advance!
HS