Which ProgDVB do I need to view HDTV? Also, do you need a mpeg4 decoder and if so which one is the best to use?

Depends on the transmission.
Some HDTV may use MPEG2, other uses h.264 / MPEG4.
Some HDTV is on DVB-S transponders, others are on DVB-S2, requiring compatible tuners.

Generally, look at lyngsat.com for such details, on the bird(s) you can get.

And you will find this on the download pages:

You can use all base functions of ProgDVB free of charge without restrictions in ProgDVB Standart edition. Some additional functions, such as "Picture in a picture"(only in 5.x), AVC,H.264 and DVB-S2 support, work with several audio streams and some other, are available in ProgDVB Professional only.

For more, read over this board, also use the search function...

You need ProgDVB Pro and any h264 decoder. Some time AC3 codec also.

Hi, I wish to watch some HDTV channel, just to check my new monitor.

I currently have a "normal" PCI Skystar 2.

Do I need a new card, to watch channels on DVB-S2 Transponders ?

Can you tell me if exist some HDTV channel on normal DVB-S transponder (Astra or Hotbird) ?

Thank you very much !
Ginosergio

SkyStar2 not support dvb-s2. HD over DVB-S must work.

Can you tell me if exist some HDTV channel on normal DVB-S transponder (Astra or Hotbird) ?

For issues like this there are resources like satcodx.com
A direct answer here would perhaps you right now, but might irritate others later on.
HD situation is changing quite often.
And as my hardware won't do HD in any way, I wont do the searching for you now.