You cannot just convert a video file to MPEG, put it into a VIDEO_TS folder and expect your player to accept it. Along with the MPEG/VOB file, your player expects some IFO and BUP files. You need a DVD Authoring tool to create those files. For instance TMPGEnc DVD Author or NeroVision Express (part of Nero 6).
Indeed, if you have the VOB, IFO and BUP files and you put them into a DVD-video compilation in Nero, it should work, unless ProCoders makes something wrong in those files.
What you could try is authoring the disc with NeroVision Express (NVE):
- launch NVE (it's shipped with Nero 6)
- select "Make new DVD / DVD-Video"
- import your VOB files
- click Next a few times
- wait for NVE to burn the disc.
You will lose your DVD menu (if you made one with ProCoder).