mandriva le 2005 won't boot anymore
 

I'm not quite sure what happened to my computer, it was running fine yesterday... a friend changed a few things like adding noapic to the boot configuration and auto login. maybe other things as well. I don't know, I was at work... args (and neither him nor me has any idea what we're doing)

this morning I start windows to see if it works. Everything seems fine, I reboot start Linux...nothing happens- no boot.

I reboot, I kill the power, reboot again... nothing.
I try the failsafe mode, because I can actually see what's happening there and it sais:
"can't find ext2 on dev/sda7 ...
Kernel Panic not syncing ...."
something about the init and try adding init=option

not that I'd know what option to pass, but unfortunately I can't type anything in anyway.

after that it does nothing.
I reboot again, try switching my mouse and keyboard back to ps2 because during installation he had trouble with usb and the hd... still nothing worked.

is there something I can type in with lilo that will make him boot up properly?
help please, I don't want to be stuck with windows again!!!

ok, here some more information:

when I run rescue-gui and say lsparts I get a list of all my partitions saying that the ext2 or root-partition is on sda6

after reinstalling bootlaoder lilo.conf has only sda6 entries finally, but the fstab still looks like this:

# This file is edited by fstab-sync - see 'man fstab-sync' for details
/dev/sda7 / ext2 defaults 1 1
/dev/hda /mnt/cdrom iso9660 user,iocharset=iso8859-15,noauto,ro,exec 0 0
none /mnt/floppy supermount dev=/dev/fd0,fs=ext2:vfat,--,umask=0,iocharset=iso8859-15,sync,codepage=850 0 0
/dev/hdb5 /mnt/win_c vfat umask=0,iocharset=iso8859-15,codepage=850 0 0
/dev/sda1 /mnt/win_c2 ntfs umask=0,nls=iso8859-15,ro 0 0
/dev/hdb6 /mnt/win_d vfat umask=0,iocharset=iso8859-15,codepage=850 0 0
/dev/sda6 /mnt/win_d2 vfat umask=0,iocharset=iso8859-15,codepage=850 0 0
none /proc proc defaults 0 0
/dev/sda5 swap swap defaults 0 0


So right now I'm not sure if ext is on sda6 or sda7 anymore. It can't find it on sda7 so I'm assuming that it just isn't there. On the other hand how would the fstab get changed, switching the two drives aroudn like that (sda7 and sda6). Is it possible that somehow the names where switched (rearranged in the partition table...)? Or did some configuration just change the lilo and the fstab files? What may have caused this strange behaviour?
Is there a way to fix it or should I just format the linux partitions and reinstall?