Is there a possible way of taking a picture of my bootmenu ? example : http://t1.gstatic.com/images?q=tbn:xOLNRxyhahN-FM:http://i3.photobucket.com/albums/y71/Cocasoca/grub2.jpg&t=1
( note : cellphone pictures are excluded -> i have a low pixel cellphone cam :( )
Boot the disk from under VirtualBox. You'll need to do this from another installation (or perhaps Live -- otherwise the disk won't be available for VirtualBox to control) and you just add the disk (you can add real disks) as the primary drive.
Anyway, once you're in, VirtualBox will let you take a screenshot.
Otherwise you could use a video-out (s-video or composite, whatever, if anything, your computer supports) and another computer with a video capture card. You can use VGA if you have a VGA capture card but most people don't. Then just capture all the video output from the first computer on the second. Bit of a task if you ask me but it's worth it for serious video recording.
My first answer gives you some options for low-level video/image capture.
But I've noticed you started another thread on a particular issue you get following grub. If you're just trying to tell us grub's available options, the contents of
/boot/grub/grub.cfg
will do.