Its actally the same name bzimage. Thats what was in this threads file lol. I am still getting that same error though. Also another quick note i am not able to pxe boot now to my machines. I dont know if its because now i have bzimage and bzimage.default in the kernal folder of tftp. I am really new to linux so i am getting use to this.

Thanks. I have done step by step what you said but i am stuck at the copy command when i type
sudo copy ~/Desktop/bzImage-newfile /tftpboot/fog/kernel/bzImage

I get sudo:copy: command not found

Ive also tried taking out the -newfile part but i get the same error. i did also take the / out before tftpboot but i got permission denied.

Should i use copy and paste the bziamge kernel and overwrite the existing one. how should i go about this. Please help.