Well I would install Linspire first, then SuSe 10.
And I would absolutely let lilo be my default boot loader. I have been using it for quite some time now, and I can only recommend it instead of letting the XP boot loader handle it.
Any particular reason for why you want to use XP boot loader? If it's for ease of turning back to a 'clean' XP system it's not a problem if you installed the lilo boot loader.
Nothing that can't be changed in 2 minutes