Tileset tsr file question

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Hey guys,
I'm working on a graphical mod for another Nival game from that period, Etherlords, and it seems like some of the textures are kept not inside textures.res but inside a different file. Does anyone know how to unpack and pack a .tsr file? Google says nothing about that extension (well maybe apart from The Sims 3 apparently also having one named like that but I bet its a different file completely).
For those interested I'll send this file here, it's a small one, only 6 mb, maybe someone wants to check it out.

https://ufile.io/soxvewt9

I'd be very grateful for any help with this one

Hey, i open this file with https://rawpixels.net/, and get this result after any magic...
This is just a pixels byte stream of images 48x48 resolution
upd. in start file maybe palettes or tiles addreses

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Oh, i`m sorry, this is correct params and result