[Typo3-dev] Values from ext_conf_template.txt

[Mario Wolff]

Hi List, hi everyone!
I'm new to this list and new to typo3-development! I'm just started with 
my first extension (mw_ltpasso). It "overloads" 
tslib_feuserauth::check_authentication and needs some configuration 
values. Right now i take the first unhidden and undeletet entry from a 
self defined database table. I think that's ugly!
I would like to use ext_conf_template.txt, but this values are only 
reconfigurable by reinstalling the extension (or not?!?). I would like 
to write a backend module to configure this values, but i can't find 
where this values are stored.
A hint would be nice!
Thanks a lot!
Mario Wolff

PS: Sorry for my english! It also ugly, i know!