Hi cahomsyjr,
As Stephen says, the Live Mesh software installs under individual Windows User Accounts, so your copy of Live Mesh should be separate from his, if you two have different Windows User Accounts. The Live Mesh Remote Desktop Enhancements do get installed system-wide, though (Live Mesh Remote Desktop runs as a service). Could you perhaps provide a little more detail about your current Windows/Live Mesh set up? I think I may be misunderstanding your question.
Thanks,
Ben.