Exporting variables from Frontend Users to Feedbackform

[mrHref]

Hello

This time I'll try to set my question more clearly. There is an example in Feedbackform about Function Callback "Input" form type  and how it would be possible to use to output something that makes sense in a form, e.g. probably hidden fields containing useful information. However I'm not expert with php or smarty things, but  I noticed that I can add variables(properties) I've made in feusers to feusers templates (logout.template etc.).

Can I use this variables some where else  (for example in Content)  to personalize content of the page ?
And is it possible to get straightforward input from Frontend Users module to Feedbackforms by using  Function Callback "Input"?
Or do I need an extra module to retrieve feusers variables from database and feed them for Function Callback "Input" in  Feedbackform module ?

I have fields such like firstname, surname, address, city in Frontend users and now I would like use that information in forms generated by Feedback form (for example name or email address is joined automatically to feedback form logged in person is applying) . 

Now I'm running  CMS made simple 0.13, FrontEndUsers 1.0.5 and FeedbackForm 0.9.12

Yours mrHref