Installing Windows Vista SP1 using BOOTCAMP?

Hey,
I was wondering if some one could clarify a few things regarding installing Windows Vista SP1.
I need to run Excel with VBA as a result i want to have both operating systems on my mac (Its intel).

I have heard conflicting opinions on whether i need SP1 or SP2.
Some say it works fine. Others say it works fine but you can't install drivers, some say you need to slip stream sp2 and others say it doesnt work at all.
Could some one please help?
When some one says you can't install drivers what does this mean.
I also have a copy of Microsoft works plus. Is there any other way i could install this?
Thanks