Comment 8 for bug 876154

I've just tested this fix on the current daily...
1. burn cd from latest precise-desktop- i386.iso
2. boot into windows, insert the CD
3. select 1st option "Demo and full installation", then option 3 "Help me to boot from CD"
4. Everything runs - only confusing bit is that it Ejects the CD at the end and instructs to reboot to complete. This is true for a normal Wubi install, but not for the CD boot helper, which requires the CD in the drive.
5. Reboot, select Ubuntu (running on XP, not sure if Vista/7 will auto boot into Ubuntu)
6. Another confusing bit: it gives the 5 second countdown with the message "Completing the install, press ESC for more options". This is appropriate for the normal Wubi install, not the CD boot helper.
7. It boots from CD, direct to the live desktop.

So, in summary. The fix restores the previous functionality of the cd boot helper.
(The confusing bits are already reported in bug 759352 )