a full stop is what I guess is called a period in america its when youre writing sentences and you want to put in a little pause like a breath it makes it a lot easier to follow your train of thought and I for one really prefer to read posts that don't make me feel like my head is about to explode if i dont get to the end of the paragraph in time you might want to try out some other bits and pieces of punctuation at the same time like commas capital letters and apostrophes exclamation marks are optional though its very easy to misuse them

sorry couldn't resist that...I'm one of those anal people who kind of get put off reading things like the above, or who involuntarily kind of shy away from the computer screen WHEN SOMEONE POSTS IN CAPITALS, I CAN ALMOST FEEL THEIR BREATH IN MY FACE!
It's just that if you're asking for help (which is cool) it kind of makes sense to make your posts easy to read and understand - you'll get more help that way.