I'm sure it's not a problem. You're going to have to update each battery manually, I'll walk you through it;
1) Make sure each battery is at full charge.
2) Go here;
http://www.dji.com/product/inspire-1/download and download the firmware update zip file.
3) Extract that .zip file, it'll open up into a folder with a .bin file and instructions inside.
4) Get your Inspire 1's camera SD card into your computer, and delete all the files in there (obviously if you have footage, download that before deletion)
5) Move the .bin file onto the SD card, eject the card and put that back into the camera.
6) Once your batteries are charged, put one into your Inspire (make sure your props are off beforehand) and switch it on. Some people open up the DJI app and view the update progress from there, but I personally don't do that.
7) If done correctly, you'll hear 4 beeps indicating the update is in progress and 1 beep followed by 2 beeps when the update is done.
8) Switch off the battery.
9) Remove the SD card, put into your computer and check the LOG file (it's a text file). It should say something like 'Update Successful' etc. Once you've gotten to that stage, you're going to have to repeat the procedure (starting from no.5) for all the other batteries.
Let me know how it goes. If you're aircraft's firmware is up to date, the battery update itself shouldn't take more than a few minutes.
Good luck,
Hans