Code:
for file in `ls *.img`
do
$new_file=`echo $file |sed -e 's/ //'`
cp "$file" $new_file
done
If that works, use 'mv' instead of 'cp'
Edit: as per ghostdog74's comment:
new_file=`echo $file |sed -e 's/ //'`
only use '$' when reading a bash var, not when writing to one (yeah, Perl is different)