ProMods

Look in the link above your post: viewtopic.php?f=7&t=26256
Everything explained here. Read especially the TL;DR Part.

hello
ive now downloaded the first file about 6 times and it still says the file is corrupt and i cant open it
https://prnt.sc/nv3ov5

You're missing part 5, you can only open the archive if you've all 7 files.

thank you, now i have all promods parts, but now whenever i start it with poland rebuilding and no other mods on it crashes

Try with ProMods first.
Crash to dekstop: problem
Game stuck on loading: Wait longer! 1st load takes time!

Poland Rebuilding is curently not updated yet for ProMods 2.40. It only works with 2.33

When I'm trying to download the files the enlargments of the files are .001 .002 because of this files are corrupted and i can't unpack them.

You need to download all parts before you can unpack them. Follow our tutorial: https://promods.net/viewtopic.php?f=2&t=3852

But when i download the files they look like this

That doesn't matter, this is made like this so the Archive Program detects that this is a multipack archive. If you've downloaded all parts and have put them in the same folder than you should be able to extract the first file and it automatically extracts all other.