I came across multiboot CD that a friend had made, but it uses a strange menu. The CD is a 3 in 1, 2003 ent, std and web. The boot sector of the CD is attached, if someone could take a quick look at it, maybe you can understand it, I'd like to integrate this 3 in 1 into my DVD, which already has XP Pro on. If possible, I'd like to use this menu, because it looks so clean and doesn't appear to need any complex scripts.

I see some strange code, is it possible that you send pic

If you hex edit the file, you'll notice the following: which corresponds to the 3 choices, Enterprise, Standard, and Web. It appears those 3 variables define the 3 different folders that the I386 directory could reside in. If you simply hex edited the file, replace the text in the file with the text you wanted, and changed the variables to something like (Pro, Home, and Corp) and then dropped the I386 directories into their respective folders, it may work. Then again, it may not I would need to see the cd structure of your friends disc to be sure.

The directory structure is like this

But unlike the guides here on MSFN, the CD doesn't use DAT files in the cd root. Its just the three boot disk directories, then txtsetup.sif in each of those points to the i386 directory in \English\Win2003\xxx

Its quite simple.
Think about it: How does CDShell work?
It mounts the bootsector(tha DAT-File) and lets it do, what it is done for.

Your bootsector is a bit more than the ones from flyakite's site. This is a bootsector which has an integrated menu. So there is no need to use cdshell. You can easily edit this file using a hex editor. (as Datalore already had shown)
If you choose one of the options of the menu of YOUR bootsectorfile, then it will load the contents of the dir, which you choosed. (wow, there are bootfloppyfiles ;D) now, everything is like in flyakites guide...

your .wbt is actually a win2kall loader made by Bart (Nu2) used in the windows 2000 multiboot guide for _www.tech-hints.com. It also had use w/ WINCDMAN. if you plan to add more than 3 OS / options, you will need to use bootscriptor,cdshell, or Bootable CD Wizard.

hmmm, pretty cool, thanks for this information, LiquidSage.