-> this is correct "Or only my finished EyeTV recording which I am limited to mpg1..."
You've discovered "the" main reason to purchase the EyeTV 250, to record in MPG2.
I am still using an EyeTV 200 (Firewire device) and love it!
I think you've hit on the difference, your 410 records DTT which I'm guessing is similar to HD. To allow this content to be recorded onto a DVD format, it has to be converted to MPG2 format (compressed). If you really can't change any settings on your device when you record shows in EyeTV I don't think you have any options. You'll have to wait for Toast 9.x to allow you to make an HD DVD which probably won't help either... sorry, now I'm just rambling...