I'm not sure that you answered the question, and I have a related one. I have several older Magellan Mobile Mapper CE units running Windows CE 4.2. According to the specs, neither ArcPad 8 or 10 support Windows CE 4.2, although 8 supports CE 5 and 6, I believe.
I think you are saying that we should just continue to use ArcPad 7.1.1 with these units, and that running itconcurrently with ArcGIS 10 will not cause problems.
Is there any way to upgrade the Mobile Mapper units so that they can run ArcPad10? Would installing ArcPad 8 or ArcPad 10 on these units without upgrading not work at all, or just not work perfectly?