how do i change/compress using DVD Decrypter

[liteonrules]

on DVD Decrypter , i choose main movie and then i ripped it to hard drive but when i tried to burning it using NERO, It said that i need a DVD R with more space.
how do i compress the movie to fit on a single layer DVD-/+R using DVD Decrypter?

[TheCDBurner]

DVD Decrypter can't do it. Use DVD Shrink: www.dvdshrink.org.
Keep DVD Decrypter, though; have Shrink save the DVD to an ISO then you can have it launch DVD decrypter to burn it-no messing with Nero