I have installed eclipse JDE plugin (ie BlackBerry_JDE_PluginFull_1.0.0.67.exe) , i can create a blackberry project only for BlackBerry JDE 4.5.0 . when i see in window ->preferences ->blackberry->installed components of eclipse ony BlackBerry JDE component package 4.5.0 is available, if i want to have multiple JDEs what should be done .Is there are any IDEs other than Eclipse which are used for BlackBerry Developement.
Sure there are component packs on blackberry server available for download:
And you can use them all in one Eclipse installation. Just switch them with window ->preferences ->blackberry->installed components as you already know.
Also may be useful: