[TYPO3-english] htmlarea RTE config

[Pero Matic]

I have nightmares from RTE back from 2004 when activex one was used. Finaly 
in htmlarea 1.7.12 i got things working fine but no.. we need new one 1.8.8 
(yes i'm still frustrated). I read manual but some things are not clear to 
me, so if someone would like to help me. I'd like to know where is this used 
(i know it's going into TSconfig):

RTE.classes {
align-left {
name = LLL:EXT:rtehtmlarea/htmlarea/locallang_tooltips.xml:justifyleft
value = text-align: left;
}

RTE.default {
inlineStyle.text-alignment (
p.align-left, h1.align-left, h2.align-left, h3.align-left, h4.align-left, 
h5.align-left, h6.align-left, td.align-left { text-align: left; }
)

is this configuration for BE - for RTE, or this should be somehow style for 
FE page? I'm asking this because i'm not sure if i'm supossed to add 
p.align-left style to my CSS (then align works) or i should do something i'm 
not aware of (to get that style for FE page)? Thank you for cooperation.