From the Train Station:
Take the metro (this will be the Vokzalna metro station) and get off on the Kreshatik station (3 stops). Once you are out on the Kreshatik street ? the main street of Kiev, ? cross the street, turn to the right and walk ahead for about 5 minutes towards the Independence Square. Cross the square underground, leave it behind and walk for another 5 minutes ? keep watching for the number 8 building. Walk through the passage into the inner court, go till the end of it and you will see a door on the right hand. Enter it (there is a code lock on the door but it doesn't work, so don't worry about it), go up onto the 4th floor and you will see a sign "TIU Kreschatik" on the door ? here you are, welcome!
From the airport:
Take a shuttle bus to the Central Train Station ? these run 24 hours and cost about 30 UAH (around 3 EURO), ? once on the Train Station, follow the instructions above.
From the main / international bus station:
Walk to the Lybidska metro station (10-15 minutes), take the metro and go to the Maidan Nezalezhnosti station (i.e. Independence Square). Once out of the metro on the Independence Square, turn towards the Dnieper river on the Kreschatik street left side and follow the instructions above.