a. The Read Me that goes with it does not meet Apple guidelines for Read Me files. There are several typos in it ("extesnsion", "occours"). Finder is not properly capitalized ("small finder patch"). We do not use the word "patch" to refer to system extensions. [Arno goes on to list several more examples.]
b. After looking at the code in this extension, it appears to be a repackaged version of the "Auto-Guest" extension which allows you to login as guest automatically on AppleShare servers. Other than that, the code appears to be benign. It is however, completely unrelated to what it supposedly addresses.
c. We are not aware of the problem described in the Read Me ("a system freeze occurs when menus are clicked if there is not enough system memory").
d. This is a hoax and should not be used or distributed further.