Hi,
as far as I know, it is not possible to install grass from inside qgis.
There you can install a plugin, that allows you to use grass from inside
qgis. So you have to install grass seperatly.
Depending on your operating system, you can install grass gis from here:
http://grass.itc.it/download/
Im so new in grass gis, so i look for help on freenode and told me about the
mail list
,there i found out that i could install it from the qgis package, and i did
it, now when i try to open it this appeare:
Error setting region (Problem with g.region?):
child process exited abnormally
and after