What SDK to download to develop applications for E90 communicator and for other PDA like devices (biggest displays) ? In these SDK I may find all characteristics of such devices I want to develop for [LCD,RAM,...] ? where exactly in the sdk find this info ?

wml/xhtml: in a URL with parameters www.example.com;test;test2 , how/where the parameters are get used ? in XHTML BASIC and in normal XHTML ?

I want to build my own library of wmlscript functions, how do it ? And to call function I must use:
mylib.myfunction();
or
mylib#myfunction(); ?