@Hypergeek
There is no problems with Avast!/Mbam, apart from that "mbamswissarmy" detection that I have seen.
And thats a rare one, with only a couple posts here.
Its happened before recently, so it might happen again. But the side effects seem minimal, if it detects,
worst that can happen is you delete it, which you should never do first anyway, then you might have to re-install Mbam, a simple thing.
I have not seen any OS crashes or bluescreens from it posted, things you get from 2 AV's, if that is the type of conflict you fear.
I have never seen the mbamswissarmy FP myself, nor had any other Mbam/Avast! conflict.
I see your running XP sp2? You might want to upgrade to SP3 before anything else, no AV/anti-mal can protect you from an OS thats not up-to-date.