UNIX for Dummies Questions & Answers

Hi there

I have 2 files containing lines like this:

d:/bla/bla/bla/bla.ext
d:/bla/bla/bla/bla.ext
d:/bla/bla/bla/bla.ext

I need to read every line in one file and then get the same line from the other file. I think getting this will be enough for me to finish what im trying to do
The lines contains path to certain files, same path, different file names, the idea is to rename files found on first file to files names on second file.
Help?
It's a bit complicated for me
If this was allready discused somewhere, i'm sorry and please point that to me

Thanks in advance

Code:

for i in `cat file1`
do
grep $i file2 
done