PET in the admincp use the phrase manager to edit the phrases that you want to customize. If you're looking for a certain phrase use the search tool. If you don't understand the {1} and {2} the look at the templates for
PHP Code:
<phrase 1="$var">$vbphrase[here]</phrase>
which the $var will be the variable passed as {1} or sometimes the phrase is built in the php.
Hope that helps somewhat.
Cheers,
g-force2k2