This may seem to be a lame query but I really need to get this done..This problem is as follows :

In my schools computer lab, the Admin has done something to the computers which makes it impossible for us to install any Messenger client...Everything gets downloaded allright but when I try to install it....it either says I do not have permission to instll this software or another error which says ""mmclient.exe not found ". The machines in our lab all run Win2000.

I would be really grateful if anyone of you could tell me the way around this....