As mdturner indicates, you can't just copy the NBRT file to the CD (or to a thumbdrive) and have it boot. You have to burn the image using a special part of your CD burning software or use a dedicated program.
Although I have a general program I use ImgBurn to take a downloaded ISO file and make a bootable CD from it -- it's free and very very easy to use:
Since the NBRT route isn't working for you then you should follow the advice given earlier by dbrisendine and AllenM to go to the free malware removal forum at Bleeping Computer as they will be able to help with their specialist tools.
If you post your HijackThis log over there they will be able to see what dbrisendine was referring to when indicating "serious infections" in an earlier post to you.
I would describe to them the symptoms you have been having and the malware you do know you had. Please read the instructions on how to set up an account and I think it also tells you what tests to run. Once you do start with them, they do have strick rules about going to other sites for help and also running or doing things to your computer other than what they tell you to do.
Put in your subject what you mentioned in your first post in this thread.
Bleeping Computer also have tools like I have to look deeper into the Computer to get more information and or programs that can give bigger more detailed logs.
Yes, please keep us posted on the progress. Once BleepingComputer starts helping you with this we cannot provide any more guidance (per their rules) on the malware removal aspect but you are allowed to keep us posted as to status.
We all wish you the best and will be happy to hear when your computer gets a clean bill of health.
Once your computer is clean we can pick up here again and make sure that NIS is operating normally after all this.