Dear Herbert!
I have a small suggestion for psZero
\psZero [Options] (x0, x1){functionA} [functionB] {node name}
Similar to \uput{distance}[angle](){} an angle and a distance could
replace xshift and yshift. Most of the time I use a distance of 5 pt.
Thank you for your tireless work, which really makes my job easier!
Markus