Thanks Tim and Jeff!
I finally took my time to dig into the SD2HD method.
It sure is a process but the output file looks good!
I found this video tutorial on Youtube: https://www.youtube.com/watch?v=4LrRLOtSVew
And after trying that method I made some snapshot comparisons on titles:

Adobe Media Encoder adds somekind of sharpness filter and boost the contrast or something.
The TMPGENc method looks really good (if not exactly) to the SD2HD-method. Maybe I can adjust the colors on the TMPGEnc method a little bit but still, it looks really good compared to the SD2HD method.
I can live with this because it’s so much easier for me to export this way and If I can’t see a big difference, I’m happy 🙂
Now, I preview all this on my computer monitor. Will this look any better if I burn it on a DVD and put it in say a XBOX 360, PS3, etc and viewed it on a flat-screen TV. Is there other ways to play ISO files to avoid burning DVD’s to preview see result?
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