Question about Hacking

I am going to start hacking my vBulletin board and it says I need to edit the file showthread.php. I went to my ftp, connected to the website and I right click on the file to "edit it". The only problem is, it won't bring up Notepad so I can edit it. It brings up "Microsoft Picture it". How can I change it so it will load it in Notepad? When it trys to load Microsoft picture it, it brings up this message that says " can't load contents into Microsoft picture it ". This is obvious why it says this as this is a picture program. But why isn't it loading it into Notepad?

[JamesUS]

You need to download the file to a temporary folder, edit it and then re-upload it.

If I download the file, edit it, do I reupload it into the same directory as I did origionally? I mean like when I reupload it after i've edited it, will the second upload "over write" the first file to the changes that i've made?

Phil~

[Joe]

Yes it will, so remember to make backup copies.

Can someone do that "who's online hack" for me, I have tried and I always screw up. I keeping getting this "Parse Error" and its a pain in the butt to open up sessions.php and look for all the lines I need to edit. I am inexperienced with this hacking thing but I am trying to learn, only to srew up.

Phil~