LarryD:
JimboZA
A quick side question, how do you attach the link to "this"?
I like this Instructable, but as I said there are loads of them.
Drop the url into your post, then select it and tag it with the "Insert Hyperlink" icon, 3rd from the left above the 
smily.
You can leave it like that, but that doesn't do everything though, you need to edit the link to get your own text in... Replace the first ] with =, then put a ] right in front of the [ at the end and type your text in between. I'm going to put that below in code tags so hopefully what I explained appears as text not as a link!
Paste the link:
http://www.ecs.umass.edu/ece/m5/tutorials/tip122_transistor_tutorial.html
After tagging:
[url]http://www.ecs.umass.edu/ece/m5/tutorials/tip122_transistor_tutorial.html[/url]
After editing the tags:
[url=http://www.ecs.umass.edu/ece/m5/tutorials/tip122_transistor_tutorial.html]text goes here[/url]