When you've already installed ABAP in Eclipse (AiE) then you know what a hassle it is to get all the pre-requisites installed by manually searching them. But there is a way to improve this step. Eclipse allows you to install Software Items from a File. I've created the needed P2F files and provided them on this SCN Wiki Page:
So now you can just go ahead, download the file matching your Eclipse version, install the pre-requisites and then you're ready to go and install ABAP in Eclipse. ABAP in Eclipse can be downloaded here.
Hope you like this new and easy way to get ABAP in Eclipse installed.