How do you make it so that when you post images, they will get resized so your forum don't get stretched & same with the code tags?

Nobody going to help me

you would use percentages instead of actual sizes so instead of width="50" you put width="30%" or whatever. Thats the way ive managed it in the past anyway.

Were do i edit this?

in templates its not just one edit though it would be numerous edits

Where though? I'm very confused.

on other templates like "postbit_legacy" & "postbit" & on other template that might display the user avatar, such as memberlist & profile.

What exacly is streching? Got a screenshot, then I will be able to tell you the template, and possiable the code to use.

http://img392.imageshack.us/img392/6642/helppic9pl.png

Does the same with big images, I want it so it wont stretch but the code or image get compressed.

The fix for code tags is:
Admincp -> Styles & Templates -> Style Manager -> All Style Options [GO] (for your style name) -> Sizes and Dimensions -> Code Block Width (pixels) -> Change the default 640px to something smaller, like 550px or something. Keep changing untill it's to your likings.

The Images are a diffrent story, you would have to hack the default image tags in the code itself, something I havn't tried yet.