Not much choice in aptitude invoked from base-config

[Jacob Anawalt <jacob@cachevalley.com>]

debian-installer rc1 netinst CD

When I choose a few tasks and manual package selection aptitude is 
started in such a way that the 'Package' option is not available in the 
view menu. Just 'Preview of package installation'.

Is it possible to get back to the package view to select more/different 
packages, or is the advanced option to skip the base-config step to 
install packages and then run your package management tool of choice 
afterwards?

Jacob