The best resources for Pervasive information is the Pervasive site (
http://www.pervasive.com).
As far as your question, what error is returned when the Everyone group doesn't have rights?
Pervasive, in most cases, uses the user's OS rights. If the user has rights, it should work.
Here's a test:
1. Remove the Everyone Group from the Pervasive DEMODATA (in PVSW\DEMODATA on the server).
2. Give rights to a specific user.
3. Log in on a client with the user from step 2.
4. Open the Pervasive FUnction Executor.
5. Open the Class file (PVSW\DEMODATA\CLASS.MKD).
6. Change the "Op Code" to 12 (Get First) and press Execute.
7. Change the "Op Code" to 3 (Update) and press Execute.
Does that return an error code? If so, what is it? If it works, the problem may be in the AccPac application.