Nandroid backup, navigation, contents and accessibility? topic

I'm really out of my depth here, so I figured I'd ask you all for help! My Samsung Galaxy S2 sgh-I727 recently got stuck in a boot loop (most likely due to a faulty power button), and I have a new phone coming in on Monday to replace it (as it's quite outdated). I was able to use ODIN to flash CWM onto the phone, which I used to make an Nandroid Backup onto my SD Card. I then put the SD card into a friend's phone, then transferred them onto my computer, merged the files together (data.ext4.tar.a and data.ext4.tar.b and the system.ext4's), then used winrar to explore the resultant file folder.

I am mainly looking to get my contacts back, and, if possible, various media, such as pictures, music, videos, etc. From my poor Google-fu, i noticed that many people mentioned that Nandroid does not backup sdcard, but I was unsure whether that meant external sd card or the sdcard storage directory (sdcard0 and such). If it does not backup pictures, music, videos, etc., is there possible a way to use CWM or such to backup these files?

Also, I found a .com that looks like it might contain contacts, maybe, but I'm not sure how I would access them to find it.

If I can clarify this in any way, I will try! If this might also do in a better place, just let me know! I'd appreciate any possible help!