I personaly like Xilisoft, (shareware). You need to convert the avi file to an iso image and then burn it to a disc. There should be no reason for 700mb to take up the whole disc. After its converted to an iso image it will be under 2 gigs, and with that in mind you can add more than movie file to your disc and save a couple of disc's.
Total Video2Dvd Author 2.4 works good, easily converts avi to dvd plays good, sounds great, easy to use, and supports alot of formats Supports most popular formats such as Youtube Flv, 3gp, h264, Xvid, MOV, VOB, Mpeg, Mpeg4, Mpeg TS, AVI, WMV, ASF, DV, Mkv, Nsv, Ogm and stream formats. It converts your video files into a compliant DVD and burns it on a DVD media.and that is just the beginning. love this program! http://effectmatrix.com/total_video_to_DVD_Author/index.htm
