Maybe they could borrow a leaf from seasoned BoJ.
http://www.reuters.com/a...n-idUSTOE68S07S20100929
....borrow, intervene heavily and aggressively till they find a new normal level of trading. But for this they have to wait for the European crisis to cool down, as the dollar rallying is yet to calm.
Few days ago Japan raised the ceiling for "borrowing-for-intervention".
Secondly, I think Ndung'u should avoid too much talk, and paraphrase Mukiha about the tiger that never declares its prowess? Plan a very effective strategy and ACT.
Thirdly, Govt should really look at long term ways of reducing FX requirements which are currently negatively infinite - invest in agric, promote manufacturing companies to set up busn, etc
Fourthly, postpone any foreign exchange payments by the govt by swapping forward, or using any other tools.