please, anyone help me, i can`t install it on a internal hdd, it`s not installing bootloader

Any error messages or more information you can provide to help us diagnose this? What have you done so far, explain in detail? And error messages when you're trying to get the boot loader installed.

i am installing livecd on hard drive, when installation progress complites, appears screen about installing bootloader, and when i click next, appeares message: "bootloader gradient package missimg"

where did you download your copy of MCNL?

this is always your best bet

http://www.mcnlive.org/download.htm

friend gave me, this is adifferent version? this will be installed on hdd?

If you can tell us the exact liveCD version, we might find out a solution. Without that piece of information, it's rather unlikely...