how do i convert ifo and vob files into a single file i can play on a media player??

how do i convert ifo and vob files into a single file i can play on a media player??

I assume you mean you already have an MPEG-2 decoder (that is, you can already play the individual VOB files).
If you google for “merge vob files” (without quotes), the first two hits are VOBMerge and VOB Joiner. You can try those.

Windows Media Player supports MPEG, AVI, WMV,etc.

If you want to convert a DVD (ifo and vob files) to a single file, you should find a DVD ripper that includes merging functine.

Recommend the DVD Ripper to you.

Video Converter, DVD Ripper, DVD Maker for Mac Users