Modifying multiple text files with excel values

[parumsomnium]

Can someone help me? I have about 140 text files and I need to modify lines 15-18 of each using different a set of values in an excel file. The excel file has two columns. Column 1 has the file name of the text file I want to modify and column 2 has the values I want to replace lines 15-18 in the text file. Is there a code that when I click a button the following will happen:
-Open text file (v1.txt)
-Modify lines 15-18 of text file
-Save text file
-Loop until all the text files are finished

Thanks!