No, the CD dir structure is not what the mirrors have. The mirror dirs are like
10.x/x86/tcz/ {Xvesa.tcz, Xvesa.tcz.info, ...}
The auxiliary files are used for searches, the app browser showing the .info files, etc. For direct loads, "tce-load -wi Xvesa", just the .tcz and .tcz.dep files are needed.