Two questions:
1. In advanced catagories of catalook a "space"-character is possible, with friendlier URL is becomes a "%20", what are the correct settings?
2. In advanced catagories of catalook it's possible to link to an URL, we use this to put (pre-programmed) searches in the menu.
    These searches arent's translated, any ideas.
Is there some sort of manual, it seams the be by far the best solution we've tested sofar, but without manual ??????
 Hi,  
You will find in the "filter settings" section in the standard strategy a transform list. You can set any characterthat you want replace. By default, the space character will be replace by "-"
You can also set a specific transform list for catalook in the "filter settings" of the catalook rewrite rules , you need to check "Override Filtering Settings" in "Overriding Settings".
Set the replace value to "_" and verify that you have space character in source Value.
 
For the seconbd issue, i don 't understand what do you mean by " to put searches in the menu".  The advanced categories rewriting works fine with the CAT_MenuNF module and all other links to advanced categories too (when we don't configure url on advanced category). I have try to configure an url to the page where i have installed the CAT_ItemPaneNF and it works  fine too. 
Did you a rewrite rule for the catalook modules in the modules specific strategies section ? Can you detailled your issue or/and give us an url where we can see your issue ?
Best regards,
 Celian,
We changed our setup(way we use) the advanced catagories, no more search url's are used.
So this issue is closed.
Thanks for the help on this one.