I need some suggestions, guidance, and just plain old help!

I know that a lot can be done with vb scripts and a lot more with VB. The company I work for refuses to spend money upgrading our NT4.0 domain and they will not purchase SMS or any other type of "remoting" software. Somehow, I am expected to patch all our desktops (about 300, all xp/2000) and I am sick of writing little vb scripts to put in my logon script and then go touch every computer.

I know vbscript okay and vb.net a little too. Does anybody know if its possible to write a quick simple script or vb app that will install ms patches on computers in my domain? It would obviously need to run under alternate credentials?

Am i asking too much? Examples?