Question on Investments

[JWatYahooGroups]

Folks -

I've been quite happy with GnuCash for my personal banking needs, and am 
now investigating it's use for my stock and mutual fund investments. I've 
read through the guide several times, and played with test data some, but 
don't see an answer to a couple of questions I have:

Question 1:
I do not buy or sell stock or fund shares very often, but when I do, I 
often "buy more" or "sell some" of what I already have, so I'd like to keep 
track of each "lot" purchased and its price so that when sold the capital 
gains tax can be calculated.  For occasional transactions, I suppose I can 
keep separate stock accounts for each purchase (100 shares in "IBM-2010, 
and 100 shares in "IBM-2011" ).  But is there a better way using just one 
"IBM" stock account?

Question 2:
What about mutual fund reinvestments?  Here, there is a small but separate 
purchase (at a different price) of a fund's shares each month. I have 
several such funds, for several years history ... separate accounts for 
each lot surely will not be convenient!

Perhaps I'm missing something on how (or if) GnuCash can keep track of 
separate purchase dates/prices for a single commodity?

Thanks in advance,

Jim W