Zend certified PHP/Magento developer

Bat file to add new line in a certain position in all files inside a folder

I have a folder with more files .ovpn contain text

Path:
D:Program filesconfig

Extension files:
*.ovpn

I need to add in every files a new line contains mssfix 0 in a certain position in the file

mssfix 0 will be added at line 96

or creating a new line at line before resolv-retry infinite

Result before adding:

OTHER TEXT LINES
OTHER TEXT LINES
OTHER TEXT LINES

resolv-retry infinite
nobind
persist-key
persist-tun
client
verb 3
#auth-user-pass

OTHER TEXT LINES
OTHER TEXT LINES
OTHER TEXT LINES

Result after adding:

OTHER TEXT LINES
OTHER TEXT LINES
OTHER TEXT LINES

mssfix 0
resolv-retry infinite
nobind
persist-key
persist-tun
client
verb 3
#auth-user-pass

OTHER TEXT LINES
OTHER TEXT LINES
OTHER TEXT LINES

The files contain other text but other must not be edited.

I prefer a simple batch solution to avoid external software

WARNING: this is a part of text, before and after this part of file there is other lines of text to not to be changed.