Thanks for all your quick replies.

Just one more question:

I have one folder with RTW 1.5 + BI 1.6 + Alexander 1.9
one folder rtw 1.5 for backup and one folder RTW 1.5 + EB

Now here is the question: What is the quickest way to install EB with BI ?
( I know how it works with the shortcut etc. ) just asking if Alexander add-on won't bother my EB with BI install.