Lion instalation will not work!

I held the option key and it told me to select a booting system (or something like that) there was only one choice. The mac is still working like before. 😠

I ran "vertify" and "repair" but the same error came up like before. I dont get the whole "shift-key" thing but I did it and now im running the repair for like the tenth time!

I certainly think that there is stuff wrong with my computer. The computer doesn't have many errors normaly, but before when I shut down my computer and booted it up, it took like seven minutes. Now it only takes abaut 40 seconds. Because I'm so very stupid, I never used time machine before. So there goes that...

I just finished runing the "verify" option and an error came up saying:

The volume Macintosh HD was found corrupt and needs to be repaired.

Error: This disk needs to be repaired. Click Repair Disk.

Funny thing is, the repair button is light gray colored and it will not let me press it.

also, how am I supposed to use "Disc Warrior" if I can't download anything on my mac?

Also, it will not let me use "Repair Disk Permissions".

I just ran the "repair error" one more time and got this:

Verify and Repair volume “Macintosh HD"

Checking file systemChecking Journaled HFS Plus volume.

Checking extents overflow file.

Checking catalog file.

Incorrect number of thread records

Checking multi-linked files.

Checking catalog hierarchy.

Checking extended attributes file.

Checking volume bitmap.

Checking volume information.

Repairing volume.

Rechecking volume.

Checking Journaled HFS Plus volume.

Checking extents overflow file.

Checking catalog file.

Incorrect number of thread records

Checking multi-linked files.

Checking catalog hierarchy.

Checking extended attributes file.

Checking volume bitmap.

Checking volume information.

Repairing volume.

Rechecking volume.

Checking Journaled HFS Plus volume.

Checking extents overflow file.

Checking catalog file.

Incorrect number of thread records

Checking multi-linked files.

Checking catalog hierarchy.

Checking extended attributes file.

Checking volume bitmap.

Checking volume information.

Repairing volume.

Rechecking volume.

Checking Journaled HFS Plus volume.

Checking extents overflow file.

Checking catalog file.

Incorrect number of thread records

Checking multi-linked files.

Checking catalog hierarchy.

Checking extended attributes file.

Checking volume bitmap.

Checking volume information.

The volume Macintosh HD could not be repaired after 3 attempts.

Umm... I think I did something wrong...

HOW TO SAVE ALL OF YOUR FILES WHILE IN INSTAL MODE

IF YOU CAN BACK UP BEFORE YOU INSTALL!!!

This is the methode that I used... so it may be a little different for you. But the basics should be the same.

So I figured out how to back up your files. What I did was I partitioned an 8GB flash drive to be formated as a computers drive using disk utility. Once this was done I could click install and would install it on the flash drive. The thing will go through the entire process of installing and will eventualy say something like: restart ur computer. Once you do that you need to hold the option key while restarting and select the partitioned flash drive. The computer will boot up. Once booted up it may take a long time (10min-2hours) for the flash drive to index. You shouldn't try doing anything while it indexes (you can tell its done by going to the spotlight search thing in the top right of your screen). Once done it will work much faster. Now go to finder and look under the shared tab. This tab shoud contain the name of your computer (if it doesn't show up... dont worry, just try again later). Click on it and say connect (you may have to enter the username and pasword of the administrator to connect). Once connected you should find all of the files that you have been missing. Connect a external hard drive to your computer and just drag and drop all of the files in your computer to that hard drive (this may take a while). Once the files are copied you can go to the nearest apple store and tell them to fix ur mac. Good luck!