I broke my Vista MBR after an attempt to install BURG on wubi. (Which i know now should not be done !)

I was able to "apt-get install mbr" and got the OS selection screen back asking me to choose between Vista and Ubuntu... Unfortunatly, both failed to start with similar problems.

Vista: winload.exe was missing or corrupted
Ubuntu: "some similar file" was missing or corrupted

So i used a Vista repair CD and got Vista back. (Which i am using now.)
But when i try to load Ubuntu, i still get the same error as before.

I guess Grub2 should be reinstalled... How should i do that with WUBI ?

I just read the section on how to repair the vistual Ubuntu partition at https://wiki.ubuntu.com/WubiGuide... unfortunatly, it just describe how to mount the virtual partition and it doesn't say anything about fixing it.

Thanks for any help.