[avr-gcc-list] switch interrput vector ?

[andi]

I know to switch app section to boot section is:

GICR = (1<<IVCE);
GICR = (1<<IVSEL);

Anyone know how to switch interupt vector from bootloader section to 
application section ?
I Try :

GICR = 0;

but didn't work :(

Andi