Sharepoint 2010, solution installer
Obviously old solution installer for 2007 MOSS ( cool project on Codeplex ) doesn't work for 2010 Sharepoint. Luckily I found people who had worked on the same problem and found a solution . Andri proposes rebuilding solutions in .Net 4.0, but his solution also works with old wsp files. So just replace old Codeplex setup.exe with Andris one and that's it! Thanks to Andri for his solution. Btw seems this project will be popped up soon officially SharePoint 2010 solution installer Some update on this topic may be found here