I made a saved search which creates custom url's to let the user enter some record. It works fine. However this custom url contains internal id of custom record type which will change when a bundle is installed to another account. Is there a way to get internal id of recordtype using the name of that recordtype? I know that it is possible in scripts, however I try to do that using saved search functionality.

I would doubt that's possible from within the search. If it's included in a bundle you can think about creating an installation script that creates the saved search and can thereby change the specific dynamic ID on creation.

ok, thats a good idea