I've repartitioned my internal drive.
(Frist solution: Swap vfat and ext3 partition.)

I want to use /home/user/MyDocs as a regular directory (no mounting).
I want the vfat partition to be mounted under another name (say e.g. /home/user/MDocs, without "y").

With genfstab I succeeded the new name to be written in /etc/fstab automatically.
But the vfat partition is still mounted on /home/user/MyDocs instead of /home/user/MDocs.

Is it possible to change the mountpoint of the vfat partition at boottime?

Found a solution:

Edited /etc/init.d/ke-recv and moved internal mmc mountpoint from MyDocs to MDocs.