Remove or Add Applications (.apk)into Custom Rom

Note: Flashing an altered ROM can brick your phone. Do it at your own risk. I am not responsible for any damages.
Requirements
1. Download the Apk Swapper utility from here and unzip it to a folder on your desktop
2.Place your custom Rom (if you have)on your desktop.
3. Keep ready the .apk files which you are about to inject into your ROM.

Load your custom ROM and let the utility extract the files

Step 1: Start up the utility. Now drag and drop your custom ROM (.zip file) on the blue bar (on the top) in the utility’s window. The utility will highlight the progress in the bottom window once the file is dropped. You will notice that 7Zip (the archiving utility) will automatically extract the ROM’s contents into a temporary folder.

Remove or add apps according o your preference

Step 2: Once all the files are extracted, you will see a list of all the apps inside the ROM in the centre window of the utility. These are the apps present inside the ROM. All you need to do is select the app you want to remove, right-click on it and from the context menu choose ‘Delete .APK’ under ‘.APK Options’. Using the same method, keep uninstalling the apps you don’t want. Using the same method you can insert your own apps into the ROM. To do this, right-click on any existing app, and from the context menu choose ‘Inject new .APK’ under ‘.APK Options’. Then browse to the location where you have stored the apps to be installed into the ROM and choose the files one by one or multiple files using the ‘Shift’ or ‘Control’ button. Note: Make sure you do not delete apps that you are not sure of. You might accidentally delete a system app or an important app and the final ROM will either crash or behave erratic. If you made an error, simply delete the ‘Temp’ folder inside the utility’s folder and start all over again. 

Once everything is done, simply compile the new ROM

Step 3: Once you are satisfied with removing unwanted apps and inserting the wanted ones, the new, refreshed ROM needs to be compiled into a .zip file back again. Once again, right-click on any app and click on ‘Compile New .ZIP ROM File’ under ‘.zip Options’. Now the utility will ask you to give the new ROM file a name and the destination where it should be created. Give in the required name and hit the ‘Save’ button. The new ROM will be recompiled as a new name in the destination folder you entered. You will see a message informing you that it will take a while to do so. The time taken to recompile the new ROM will depend on the size of the ROM and the speed of your PC. Once the compilation is finished, you will receive a dialogue box confirming the same. You can now try out your new ROM on your Android handset.

Give in a new name and destination for the ROM.

Source:-firstpost