Installed the Ganymede M7 packages, then tried to bring in the archived site of ME 6.5M1. Just trying to bring in MyEclipse IDE Workbench, or entire archive, get same result, install fails with:
Can’t find a solution where both: Match[requiredCapability: org.eclipse.equinox.p2.iu/com.ibm.icu/[3.6.1.v20070906,3.6.1.v20070906]] and Match[requiredCapability: org.eclipse.equinox.p2.iu/com.ibm.icu/[3.8.1.v20080402,3.8.1.v20080402]] would be satisfied.