Disney titles?

Just a curious question, has anyone had any problems with any Disney titles like A Bug's Life, Antz or any other Disney title?

I opened up the original VIDEO_TS.ifo file but there is no VMGI_MAT table, only a VMGM_MAT table. Under it is First Play PGC. But in IFOEdit, you can't right click on it (it does nothing). Can you explain it a little clearer?

I will try your suggestions and see if it works. BTW, did you check out my post about replacing the newly authored vobs back into the original dvd structure? Also, is it possible to turn off button assignments in IFOEdit? For example, if I want the 'Behind the Scenes" button in one of the menus NOT to work (if someone clicks on it, it does nothing). Is it possible to do this in IFOEdit? Thanks.