Hi,
I was taking to M113 with all my troops then pass to base where Mi24 is located (left to a forest but try to pass it through the south side 'cause northern side is heavy guarded). after refueling Hind I was flyin' to Guba's base (west side) where taking arrest over the Guba in an UAZ (kill three spetz naz troops and you'll got a cuscene). Then atke your troops and Guba as 8th troop to Hind and fly North-North-East. You'll faced with 4 Shilka and finaly you'll find SCUD launcher (cycle target throug the TAB button).
have fun,
Rendol.