Snow Leopard and Lion on external hard drive
I successfully installed Snow Leopard on an external hard drive in one of the partitions. I am also able to boot from the Snow Leopard on the partition, access the internet, get my email and have successfully installed Evernote. I am also able to access Apple Store and needed items on my laptop.I am using a MacBook Pro as the laptop so it starts up with Snow Leopard from the external drive and I can still access my original info because I used Super Duper to clone my hard drive (running 10.5.11). My question is when I access email and the internet when Snow Leopard is booting does that change the settings on my MacBook Pro. All was fine for a couple of days but today I was unable to access the Internet or get my email when I booted from 10.5.8 on my laptop. (The external drive was not connected.) I was able to figure out what to do to get everything working again but I'm not sure I could repeat it. So, if I boot from an external drive does that change the settings on the laptop? If so is there a standard way to change things back. I did make screen shots of the settings on my laptop once I got it working again.
Thanks.
Nancy
MacBookPro, Mac OS X (10.5.8)