actually I'm running a wordpress MU website and each website has its own "life" but now I would like to show last X posts of each blog of my network on the homepage. I know how to do it using Feeds and a plugin named FeedPress but this is a "dirty" way to do it. Is there anyone who knows how to do it? Please Step by Step instructions I'm not a Noob but.... not even a programmer. Thank you to all!
If you've already got a solution that works using FeedPress you might as well stay with that, there isn't a particularly clean way of aggregating multisite posts into a single blog.
One alternative is to use the Sitewide Tags plugin, but given what you want to do, you should probably stay with what's working.