OK, solved this by hacking in TopProces.js and merging CPU and memory tables in one. Unfortunatly don't have time to make this right so other people can benefit, in this quick and dirty version when I select CPU in settings both CPU and Memory are shown
btw. I don't know about gadget programing but this don seem right
result += '<tr><td class="processName">' + process.name + '</td><td class="percentage">' + percentUsage.toFixed(2) + "%<td>";
last td tag is not closed, and there is no closing tr tag, so I changed to this
result += '<tr><td class="processName">' + process.name + '</td><td class="percentage">' + percentUsage.toFixed(2) + "%</td></tr>";
but then doesn't look ok, so I quickly change it back to bad markup ;)
So just in case that someone need this also I will put link to it here
http://www.antoniob.com/download/TopProcess.zip