Ultimate Boot CD

i just recompiled the iso with another application (= magiciso) and no checksum errors appear.

hey, I used the application ultraiso to extract the contents of ubcd.iso and recompile it with "isolinux.bin" as a bootloader. When it boots in virtualpc i take the message: "isolinux 3.35 2007-01-28 isolinux:Image checksum error, sorry... boot failed: press any key to retry..." ...