[R] Plotting an lme( ) object

[Greg Tarpinian]

R for Windows, version 2.2.  I am trying the following
code:

BLAH.lme4 <- lme(fixed = ...., data = ...., random =
....)
plot(BLAH.lme4, resid(.,type = "p") ~ fitted(.) |
GROUP, 
     id = 0.05, adj = -0.3, 
     idLabels = BLAH$VALUE,
     main = "Pearson Residuals vs. Fitted Values, by
Group")

When I use plot( ), it generates a nice plot. 
However, no 
matter what I use for "adj = ..." I cannot get the
observation
labels to shift up, down, left or right.  How can I do
this?
I am trying to follow along with the example in
Pinheiro and
Bates, page 176.

Thanks much,

    Greg