Mods should generally come with step by step instructions - these take the form of...
- edit xyz.file
- find someline
- insert thiscode
- find someotherline
- replace it with someothercode
- upload files to webspace
- navigate to updatedatabase.php
...
...
You will need to know some basic web management skills - how to upload / download files from your website, How to edit files with a text editor, and most importantly, how to backup / restore your files and database.
If you buy mods from reputable sellers, and follow the included instructions, you should be fine.
/DM
