Allowing multiple EMDK versions on one design workstation

Currently all EMDK installers will not allow for installation of multiple EMDK versions.  I'm not a big fan of this.  If I have multiple projects deployed at multiple customer sites, and only one project needs updating to the latest EMDK, why must I invalidate all other design projects.  It should be my prerogative on which EMDK I choose to compile against and deploy.


Anyone else have input on this issue?