as the tilttle says,i need a software that can edit diferent audio to some other MKV and strach it cut it .....to play as video shows,

i have tried Vegas pro but cold not do a thing ,its a bit complicated for a rookie ...

so i would like oppinion an which software should i use an a feew gides on how to put edit audio....

Thanks....(BTW I am trying to ad ENG audio to Operation Condor with Jackie Chan)