Okay, so I want my friend to be able to play DBO. I don't want him to have to suffer the aggravation of all of the time and effort spent into download the game. So would it work if I take my DBO file, copy it onto a disc, and put it into his computer? Would that make it faster and easier for him?

If you don't want your mate to have to download the game, he needs the installer file, any dbo revision will work.

and your up to date game files.

Just use the installer to install as normal.
once that's complete, drop your upto-date game files on top of the install directory, and boom you're done.

hmm use team viewer for file transfer i did it with my friend, whole dbo folder transfered for about 10 min and he was able to play but he must enter from C/Programfiles/DBO_CT_TW/DBOLaucher coz no icon on desktop but thats not problem :)

you can go the DBOlauncher and right click "Send to Desktop"