My Forum got hacked, need help on how to put a back-up into it.

[LDChaosBdon]

^topic^

[Kindred]

":look at the topic:" is not really helpful information.

version of smf?

download the SMF files that match your previous installation.
upload those files to your site.
use repair_settings.php to set the correct information...

or, if you have a backup, upload your backed up files, overwriting all of the files in your forum directory.