Hey, I got ubuntu installed on the same HD as WINDOWS, and and I've read that in order to see the contents of a HD or another device I need to mount it (although this doesnt happen with a USB Memory), ok anyway When I right click on it, and try to mount it, it gives me this:

error: device /dev/hdb1 is not removable

error: could not execute pmount

and If I try to change the permissions it gives me:

Sorry, couldn't change the permissions of "11.7 GB Volume".

I dont know why since Im the administrator, and stuff, so the thing here is, What do I have to do to see the contents of my hard drive.

How do I really change permissions?
How do I change my password?? (session password) its quite simple
Whenever I put a USB Memory I can add things to it, but If I try to put those files I just saved on a windows system, it wont let me, and also, If I delete the files on ubuntu they wont be deleted on windows, the only way I can transfer things is from windows to ubuntu... whys this?

Whats better than ubuntu? I've heard about "knoppix" (spell) but I really don't know which one is better, I'd really like to know!

Thanks in advance!

With windows disks that are using NTSF you cannot modify anything on the filesystem because it's not fully supported by linux. The only thing you can do on a NTSF file system is read what is on it and copy files from it. You can not change the permissions because of this fact. But as a superuser you should be able to transfer the files from windows to ubuntu but not the other way around.

Knoppix is a live-cd, I don't think it's ment to be installed on the hd even tho you can do it.
Btw, have you tried mounting it manually from the terminal? mount /dev/hdb1 /mnt/usb
(if you don't have the folder /mnt/usb create it with mkdir /mnt/usb)

although with the ntfs-3g driver, ntfs support is now relitavely safe and stable!

As said knoppix is more a live cd distro. As for your problem in order to mount a drive it needs to be in /etc/fstab. Also I have not kept up so I could be wrong but linux still does not have that good of ntfs write to for ntfs drives. Might want to check on that though.

you all are so kind! and firedance I put that on the terminal and my harddrive partition (the one I wanted to access) is gone

How do I change my password??

at a terminal just type