missing right Alt - remapping xmodmap

Now I’ve got small keyboard with no right Alt key (AltGR).
I need to remap other key, preferably right Crl key, to simulate right Alt.
I need to use right Alt to put my national characters in normal way (Alt_R + some letters).
That is hard.
The only thing I can achieve is by command
xmodmap -e “keycode 105 = ISO_Level3_Shift”
Than I have these character - BUT ONLY IN THE TERMINAL WINDOW. In Gnome enviroment (word processor, emails) it doesn’t work. It still acts as typical control key.
my xmodmap is

shift       Shift_L (0x32),  Shift_R (0x3e)
lock        Caps_Lock (0x42)
control     Control_L (0x25),  ISO_Level3_Shift (0x69)
mod1        Alt_L (0x40),  Alt_R (0x6c),  Meta_L (0xcd)
mod2        Num_Lock (0x4d)
mod4        Super_L (0x85),  Super_R (0x86),  Super_L (0xce),  Hyper_L (0xcf)
mod5        ISO_Level3_Shift (0x5c),  Mode_switch (0xcb)

I use ISO_Level3_Shift because using Alt_R does not work.
Can you help me?

the solution is to remove control which is now duplicated

remove control = ISO_Level3_Shift

But I have another question.
How I can load .Xmodmap automatically at starup?
I use SUSE 12.1 with Gnome 3.
It seems that .xrcinit with simple command xmodmap ~/.Xmodmap does not work at all.
I have to load my local .Xmodmap manually