from console or cli login.

1) enter console tools menu.
control + alt + t
2) enter boot options menu.
select option 9 (boot options)
3) Select system architecture
option 0 allows you to select your default system architecture
(X) 1 32bit system (2.6.27)
( ) 2 64bit system (2.6.27)

I have never seen an option for the timer, but you can edit the boot loader config files directly and change the time.