This mission is easy, you just try to survive 3 star wanted level, then you get some weapons and go kill a Russian mafia member that had send the police after you... really easy.

You still need DYOM IX for this one : https://gtaforums.com/topic/981899-dyom-ix-modification-for-dyom/

This is the mission from the mission pack named "The Deal" (Which is my second mission pack after "Greg's Wild Ride" (Check it out as well if you have the skill.).)

Have fun, I guess.