request1 :
A. use wmctrl(wmctrl -r :ACTIVE: -b toggle,fullscreen).
someone uploaded it on this forlum.
B. use mrxvt instead of osso-xterm .
you have to download a debian package (http://http.us.debian.org/debian/poo...1+b1_armel.deb)
, extract it (dpkg-deb -X mrxvt_0.5.4-1+b1_armel.deb dir)
, move the binary (mv dir/usr/bin/mrxvf-full /usr/local/bin/)
, write a .desktop file (/usr/share/applications/hildon/mrxvt.desktop)
and edit your config file (~/.mrxvtrc).
but mrxvt is faster and more flexible than osso-xterm.
(ex: there is "-fn" , fullscreen startup option)

probably , mrxvt can realize your request2.
add "Mrxvt.macro.KP_Enter: NewTab scriptname.sh" to ~/.mrxvtrc .