I cant login after installation

[obs]

I'm a total newb.

I have reinstalled slackware 3 times and I get always the same problem. When I try to login as root after installation and reboot I get this:

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darkstar login: root
Password:
Linux 2.4.26.
bla-bla-bla
You have new mail.

Welcome to Linux 2.4.26 (tty1)

darkstar login: (again ask me for login.. and again, and again..)

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When I login as root with wrong password it just says "Login incorrect.", so I'm sure that my password for root is ok and slackware recognize my password.
===

I found solution about this problem, but i dont know how to do it. Well, I found this:
Boot of your CD (rescue-mode ;}) and mount the linux-partition with /etc read-/ writeable and just edit /etc/passwd /etc/shadow to be passwordless for root...

Can someone help me to do this (may be just to write comms and steps that I must do), or just a solution for my problem if this will not work?

Thanks!
obs

[Vergil83]

boot from you rescue cd (#2). then

mount /dev/hda1 /mnt

or hda2 or whatever you installed slackware on

cd /mnt/etc/

then use vi or pico to edit those files however you need

[obs]

Well, I fix it..

If someone have the same problem, can fix it by adding more /root space (4GB is a nice idea for "full" install) and reinstall.