Bloody hell K, that sounds like when my son is trying to explain computers to me!!!!
Silent_scream told me a really, really easy way. Open 2 windows to bus, so you can flick from one to the other. On one, you'll have the post/pm you're writing, on the other, the original post/thread you want to link to. On the original, just click on the address at the top of the page (that starts with
http://buslist, www.*** etc) to highlight it, then press Ctrl and C. That means you've copied the address/link.
Then go to your original post/pm, place the cursor where you want the link to show up - right-click, and select "paste" from the pop-up menu. That's it! If you want to check it's worked (I always do, am a bit anal about things like that!

) choose Preview for your message, and click the link. It should take you straight back to the thread you're wanting to link to.
The fancy stuff - like ppl saying "this thread" and it takes you there... nfi. But the above is a simple way of linking. It must be, it works for me.
Sarah