I've tried to install the pinstripe beta but i was aske dfor a second Cd.............which i hadn't downloaded. I think you should look at the Mandrake 7.1 installation program : it begins by asking what CDs you've got and then it proposes you ONLY the packages availlable on the CDs you own. It's a very annoying bug because i 've spend a lot of time to choose the packages to install and now i can't finish the install, i can't even tell it to ignore the packages on the second cd. Hope you'll resolve that before the final version. For now i'll go and download the second cd to finally try this beta.
The install process requires all CDs be present. It is possible to install from a single CDROM if necessary by avoiding selecting packages from the second CD (just mount the second CD and look at it to see what packages to avoid, or just use one of the custom components (dont do individual package selection)).