sis file for tomtom 5.2

Hi does anyone have the sis file to run a copy of tomtom 5.2?
I have been digging around forum and find that i need sis file(whatever
that is)to run software on nokia n70.
I have a 512 card with the said tomtom on it but want to put a 2gig card
in phone and use the software from smaller card.
Thanks very much
Jazzy29

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