I have two avi files and I wanted to know how I can put them into a dvd?(DVD+R)
Read CM's tutorial in the Guides & Tutorials section.
As above, and set the CD Size to 2200 ( 1/2 a DVDR) for each. Dont make Images and then author the *.AC3 and *.mpv in TMPGEnc DVD Author or DVDLab adding the appropriate menu.