copied from the Internet:
Newsgroups: rec.radio.amateur.misc
From: squrppi@krk.fi (Sami Reijonen)
Subject: Re: DJ580 mod
Organization: Radio Club of Kauniainen (OH2NRG)


the DJ580 mod 

This modification widens the listening area to 130 - 179.995MHz and to
400 - 469.995MHz. It does not allow one to transmit out-of-band but says
only "Off" :-)

As you might already know, software altering for the radio is done as follows:
Use FL/PL lock, enter "#" and then the 3-digit number. Just like the documents
tell how the cross-band repeater is put in action.

this information: the mod for the 560 model
- but it works just fine in my 580E. Fine thing, still have my guarantee :-)
-- 
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Note: I haven't tried or verified this, proceed at your own risk. WA2ISE
/EX