Installation etc is no problem.
After installation, the MacBook is no longer started. Have ultimately tried all variants, sometimes individually, sometimes with nem other memory, time slot 1, time slot 2, etc. without success.
The only functional combination is now 1x 1GB 667MHz original macbook memory + 1x 2gb 800mhz qumox.
Since it is of 2 different clocked store a combination, of course, only the lower clock is detected ... shame.
at least the memory of 1GB growth is noticeable