summary buffer newb question

[Peter]

OK, a quick newb question, if possible - I've gotten everything set up
pretty happily (a nice summary-line-format, etc.) but I can't figure
out how to change the initial appearance of the summary buffer when I
first enter it from the group buffer - I'd like it to look the way it
does after hitting "=" and "T H", that is, with all threads minimized
and with no article selected (just the summary lines).  Can I get a
clue on this?  Also, and relatedly, are there any web-accessible
collections of .gnus files, as there are for .emacs files?

Thanks much.