I was given instructions to download, install, then replace a file on the first CD of a 4 CD set to be able to run it.
My question is how do I replace that file on the first CD? The CD properties says that there is 0 room left but the files only take up 600. I’m guessing that the CD is closed. I’ve tried a CD-RW thinking that i could rewrite it that way but again i says that there is no room left on it.
I’m new and confused. Any help is appreciated. 
More Info...
I used Alcohol 120% to create the disks. Again, the install went fine but to run the program it needs the original disk 1 in the drive. I’m gussing to create the original CD1, I need to replace the one file. That’s where I’m stuck.
Thanks again.