Yes start reading the appropriate threads in the MR MRV forum by clicking here This a self help forum if you want it you read up on how to do it because nobody here has enough time available to hold your hand through something as complex as that.
I dont think the Humax 5400 works with the MR/MRV series, others may be OK
The MRV225 can be updated using the receiver remote for a lot of the channels.
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