There is no problem to run standard and community edition on the same PC, but there is a problem to install them both on the same machine, because they are trying to set the same virtual directories in the IIS (i.e. [Default Web Site]/telerik/Sitefinity3.0). The workaround is:
- install the first edition;
- move all installed files to a different location and create virtual directories for Sitefinity3.0\ProjectManager and Sitefinity3.0\TIUSite;
- uninstall the first edition and ensure that all files and folders except WebSites folder are deleted from the installation directory;
- install the second edition.
As for installing Sitefinity on Vista, you should not have any problems. Here are the points you should consider:
Please let us know if you experience any difficulties.
the Telerik team