How to join 2 mpegs?

sorry if this is a really basic question but can somebody please tell me a decent programme to join 2 mpeg files together to make 1 mpeg file please.

Thanks alot

movie joiner

thanks ako

Alternatively, you could use TMPGEnc MPEG Editor, or for a free alternative you could use VirtualDubMod after framserving the MPEG with AviSynth (it will join AVIs without frameserving).