All about tweaking - Read this First

You will find lots of Tutorials here.
I will write them here and list them by order in which you should read them.

What is Tweaking
If you don't know what's tweaking and want to find out read it here
https://worms4mayhem.forumotion.com/faq-tutorials-f5/what-is-tweaking-t12.htm
Recommended tools :
This tool will make your tweaking easier. It is an Xml editor. However, you might find notepad easier but it's worth a try.
https://worms4mayhem.forumotion.com/faq-tutorials-f5/xml-editor-t49.htm
Starting Tweaking
You are ready to start now. Visit this Topic.
https://worms4mayhem.forumotion.com/faq-tutorials-f5/how-to-tweak-t54.htm

How to install maps tutorial
https://worms4mayhem.forumotion.com/worms-4-mayhem-f1/map-install-tutorial-t41.htm

Our older tutorials - you can check them if you want
1.How to change list of particle effects and use them on a weapon
https://worms4mayhem.forumotion.com/faq-tutorials-f5/how-to-find-list-of-particle-effects-and-use-them-on-weapon-t14.htm
2. How to change payload file
https://worms4mayhem.forumotion.com/faq-tutorials-f5/how-to-change-payload-file-t13.htm