Processing Large Binary News Groups?

[Hart Larry]

Hi All:  I am a subscriber of giganews, which now keeps binaries 100 days. 
Seems that with some binary groups showing 1 million or more articles, none of 
the usenet tools like this large a group.  trn says "out of memory, signal 1 1 
bye"  NewsLite gave me error messages and bombed out.  You see, first I look 
through a group in trn--and just leave articles I want to decode.  Now, that I 
can pipe yenc encoded messages through uudeview, I can once again use pine.
Anyway, I get the idea that its more the total size than number of articles. 
Is their some better way to handle large groups, without just catching up--and 
starting from now?
Thanks so much in advance
Hart