Inno checkbox

for clarify: similar has avira av personal while installing asking for comnifrmation about non commercial use...

Are you trying to have a license dialog displayed so that the user must accept it?  
If so, add the LicenseFile= to your [Setup] section.  You'd need to point it to a Text or RTF file.  
Something like:

; Script generated by the Inno Setup Script Wizard.
; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!

#define MyAppName "My Program"
#define MyAppVerName "My Program 1.5"
#define MyAppPublisher "My Company, Inc."
#define MyAppURL "http://www.example.com/"
#define MyAppExeName "MyProg.exe"

[Setup]
AppName={#MyAppName}
AppVerName={#MyAppVerName}
AppPublisher={#MyAppPublisher}
AppPublisherURL={#MyAppURL}
AppSupportURL={#MyAppURL}
AppUpdatesURL={#MyAppURL}
DefaultDirName={pf}\{#MyAppName}
DefaultGroupName={#MyAppName}
OutputBaseFilename=setup
Compression=lzma
LicenseFile=readme.txt
SolidCompression=yes

[Languages]
Name: "english"; MessagesFile: "compiler:Default.isl"

[Tasks]
Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked

[Files]
Source: "MyProg.exe"; DestDir: "{app}"; Flags: ignoreversion
; NOTE: Don't use "Flags: ignoreversion" on any shared system files

[Icons]
Name: "{group}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"
Name: "{commondesktop}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon

[Run]
Filename: "{app}\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#MyAppName}}"; Flags: nowait postinstall skipifsilent

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> Are you trying to have a license dialog displayed so that the user must accept it?  
no look at my second additional comment after post

So you want two agreements?  One for the license and the second for some other confirmation?  

See this:
http://img528.imageshack.us/i/94008901.jpg/

Need similar, one agreement already exist this is std and easy, as last step before proceed to install final confirmation in such style in inno...

is that possible in inno?

There is a problem with lenght of: CheckBox Caption 'TCheckBox'

Seems to be limited to width of installer window and not word wrapping to next line if caption is longer.

Any solution for that?