First off, the moderator who moved this topic out of the DVD2one forum did so unfairly. DVD shrink when used in combination with DVD2one makes DVD2one an even more attractive product.
zhokov asked >> "How can you use them both?"
Answer: It really helps with large DVD's with extras that you don't want but you want to choose what you want to keep. First run the DVD thru DVD shrink. Go into Re-author mode and use the preview window to decide what stays, what goes and in which order. Back it up to your hdd using No Compression. Then run it thru DVD2one as you normally would. You won't get menus. The disk will play sequentially and all chapter points will be intact. Very simple. Especially useful for those DVD's that require you to grip the remote and manually select every deleted scene when there is no "play all" option.
But that's just me.