Animated Gif simultaneously in two different location of large background

[2083389396]

Hi guys, 

the concrete links and stuff are only an example to explain the task.

For an animated Gif, I would like to use this zoo image as background, which must be visible in the background for the whole time the animation plays.
https://img.schnaeppchenfuchs.com/img/51/79/f0/zoo.jpg

I want to run the smiley 2 animation (s2) near the lion and the smiley 4 animation (s2) near the elephants head.
http://www.goodlightscraps.com/content/s...iley-2.gif

http://www.goodlightscraps.com/content/s...iley-4.gif


So when you play the animation, s2 and s4 starting their movement SIMULTANEOUSLY.

Now, the only way to achieve this known to me is manually:

Have the zoo image as background layer.
Paste s2, its 7 layers will be visible in the layers pattern dock above zoo layer and named frame 1 (1ms) replace, frame 2 (1ms) replace...
Move every layer manually near the proper XY position near lion.
Duplicate background layer 7 times, move each duplicate below one of the frames, merge frames down to background.
Rename all the background, background copy1,... into frame 1 with lion smiley (1ms) replace, frame 2 (with lion smiley 1ms) replace...

I do hope this descirption does not confuse!!!

For the other animated smiley:
Paste s4, its 7 layers (named frame 1 (1ms) replace, frame 2 (1ms) replace...) will be visible in the layers pattern dock above frame 1 with lion smiley (1ms) replace, frame 2 (with lion smiley 1ms) replace,...
Move every layer of the s4 animtion manually near the proper XY position near the elephant. Merge down frame 1 (1ms) replace onto frame 1 with lion smiley (1ms) , merge down frame 2 (1ms) replace onto frame 2 with lion smiley (1ms)  and so on.

Sounds like A LOT OF MANUAL WORK , and this is only for describing, the actual project might use animations with 40 frames.

I was also looking for some online gif software, but did not any helpful for my task. 
1.Is there a magic gimp script / way or other software to help with the whole problem?Also very helpful to know: 
2. After loading the background png, how to paste the animated gif and its 7 layers NOT IN THE CENTER, but at a certain XY position, so all the 7 frames are automatically pasted at that XY position.
3. How to AUTOMATICALLY merge 7 frames down to the background image, so they are still 7 frames and the background image is dispayed in every frame.
 
I really do hope you understand what I want to say, let me rephrase if not! 

Thanks in advance for any effort!