Hello Kukulo, there is a new link now in the first post clearly labelled as from Edlor, sorry for the problem but only the old franken version was posted in the first page that is now labelled as such, I do not know what happened to the link to the Edlor version but I appologise for any issues it caused you.
Look for 'Texan_AT6 (new 3d import from Edlor)' in the first post at the bottom for the link.
With SSP you should only use the link I provide if you actually have the aircraft in your game otherwise you will get a CTD if you add the entries and it is not in your game, no need to download all the links unless you need them.
You will need to create a new section for the entries in the stationary and technics ini, mine is after the stock entries.
As for the La-9, if that falls within the time period 1936 until 1945 then please ask SAS~Epervier in his thread:
https://www.sas1946.com/main/index.php/topic,15399.0.htmlI usually only add things to my thread within that time period if Gabriel has indicated he will not, usually aircraft from other sites or beta mods.
Hope that helps.
Wishing you all the very best, Pete.