SEF advance with Extcalendar and admanager

Hi,

I'm running SEF advance and Extcalendar + adsmanager modules.
I have an issue with these modules as URLs are not SEF .
I'm not an expert of PHP but I would like to improve the URLs.
Do you know if sef_ext files exist for those modules or if there is a(n) easy way to rewrite URLs (using alias ?)
The links: http://www.cassedu.com/v3/option,com_extcalendar/Itemid,99999999/extmode,week/ (in french)
http://www.cassedu.com/v3/option,com_adsmanager/Itemid,27/ (in french)

Thanks in advance
Thomas

I am not aware of sef_ext files for that components.
So the same applies: ask authors to write them, write yourself or pay someone to do it.

You can use alias as well but then each URL must be added manually.

fine for sef_ext.
i tried to use alias for extcalendar but it doesn't work apparently.
What I did:
component=>sef advance=>alias=>new
then entered www.cassedu.com/v3/option,com_extcalenda...999999/extmode,week/ which is one of my non SEF URL then gave the name of "calendrier-semaine"=> save
then I opened my website and checked the link but unfortunately, the URL still remain the same
Did I miss something ? Could you help me with this ?
Thanks!
Thomas

www.cassedu.com/v3/option,com_extcalenda...999999/extmode,week/

This is not non-SEF link. It is absolute link created with built-in SEF.

non-SEF link would be something like:
index.php?option=com_extcalendar&Itemid=99999999&extmode=week

Disable SEF in global configurations to find out non-SEF links and always enter relative URLs (beginning with index.php?...), never absolute (with http://).