I've found an other way to solve my problem
PHP Code:
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Page custom CreatePageFinish
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Function CreatePageFinish
nsDialogs::Create /NOUNLOAD 1018
Pop $DIALOG
nsDialogs::CreateControl /NOUNLOAD RichEdit20A ${WS_VISIBLE}|${WS_CHILD}|${WS_TABSTOP}|${WS_VSCROLL}|${ES_MULTILINE}|${ES_WANTRETURN}|${ES_READONLY} ${__NSD_Text_EXSTYLE} 0 0 100% 140 ''
Pop $RICHEDIT
CustomLicense::LoadFile "License.rtf" $RICHEDIT
;Call LoadLicense
### Radiobuton: auto install ###
${NSD_CreateRadioButton} 1 180 450 15 "Qick insall"
Pop $RADIO_AUTO
${NSD_CreateRadioButton} 1 210 450 15 "Custom install"
Pop $RADIO_MANUAL
nsDialogs::Show
FunctionEnd
Hope, it'll help someone.
Here is link to the plugin:
http://nsis.sourceforge.net/CustomLicense_plug-in 