save download info into the file which is being downloaded

Hi,
IDA = internet download accelerator have some good features which you can add them to your download manager:
1- IDA saves the download info (like the source URL) inside the file that is being downloaded from, so that when you move the file into a new windows OS that has IDA installed, and double click on the file in win explorer, it will automatically know from which source URL should it download the file and automatically continues the download from where it is left without asking you for the file source URL! This is an awesome feature that makes IDA partial downloaded file portable! Please add it to FDM.

in order for the above idea to work, FDM must also save the partial downloaded/ing files with an extension, so that it can detect when we double click on it so:


2- IDA saves the file which is being downloaded with an extension to that file that is associated with IDA so that when you double click the file it will automatically bring up IDA and continue from where it left off.
Please add the same features into your software and add the download groups into your software like there is for internet download manager. the scheduler part of IDM I mean.