How can i put 2 dvd movies in to one DL DVD+R disc? what programs do i need also, which program can i use to make a selection menu? Thanks

you could try using dvd shrink to make both movies about 4 GB
then use TMPGEnc DVD Author.
to creat a menue and save the finnished as a multi movie .
that will fit onto a DL dvdr :)

DUAL Layer DVD is about 8.56 GB so there is no need to shrink the DVD.
Use Nero 7 to Burn ur Data.