Monitor multipel CPUs over network

Hello. I am running multiple calculation applications on networked machines (LAN, workgroup). PCs do not have monitors nor keyboards – I access them through Windows XP Remote Desktop. The PCs are a mix of single CPU, hyper-threaded P4, Dual and Quad.

I am looking (for a long time now) for a utility that will allow me to monitor CPU load on multiple networked machines. There are many CPU monitor widgets in archive, but all of them seem to be for local CPU only. I would like to have a panel on Desktop with multiple graphs, each for a PC on the network. Would be nice to monitor each CPU for Quads. Would be nice to also monitor RAM levels.

Anybody has an idea for my need?