How in the hell do you time stretch on cubase sx

I have an old o'jays sample and there's two parts that I looped. The two parts that I looped have almost the sample tempo but ones a tad bit faster because when I lay my drums on top of it the drums are perfect on the first 4 bars but when the 8th bar comes on the second sample sounds off because it's a little faster. So my question is who knows how to time stretch on cubase sx so that both samples are the same tempo?

Dude you need to reed the manual...!!!! Time Stretch is easy... and if you drop markers you can automate it using HIT POINTS.... try doin' a search in the SX manual... or try the help window its mega informative...!!!