Is there a way to search for and get a list of (all) the verbs in e.g. the Hiphil, Piel etc.?
Searching for Hebrew verb stems
Yes, there is.
Set the WTM as your search version.
Type in the following search: .*@vh*
When you have typed the @ sign, you will find that BW 6 provides a list of codes to enter. v = verb; h = hiphil;
The * tells BW to ignore the conjugation, person, gender & number information and find all Hiphil verbs.
By extension you should be able to figure out how to search for all Pi'el's Pu'al's etc.
Hope that helps.