Apparently the 4.1 and 4.2 SDKs cannot coexist for the IDE since they have the same name "IABITSYX". Any workaround for this? Hacking registry and directory names not a problem.
Change string of "IABITSYX" in following registry. And re-run PlatformBuilder or eMbedded VC++ again. *NOTE* Do NOT change any other keys. It may cause system unusable.
Registry Key of IABITSYX CE.NET 4.1 HKLM\SOFTWARE\Microsoft\Windows CE Tools\Platform Manager\{F384D888-F9AA-11D1-BB9E-00A0C9C9CCEE}\{076F80D3-9B19-44C7-B891-326D7CB847F4}
Registry Key of IABITSYX CE.NET 4.2 HKLMA\SOFTWARE\Microsoft\Windows CE Tools\Platform Manager\{F384D888-F9AA-11D1-BB9E-00A0C9C9CCEE}\{D19AF4AD-884D-4F6D-8889-83AC45DF6DAE}