1) install sd6015_2-0-1_release.exe
2) sd6015_2-0-1_lite_update.exe
3) install the rest of the liveries,manuals,etc.. as you wish.
4) copy and overwrite \"sd_yak40_6015_v2_pa.gau\" onto the aircraft panels dir: SD_Yak40\\panel and SD_Yak40\\panel.2
5) enjoy