View "Task Manager" type display remotely
Process explorer can't, to my knowledge, connect to a remote computer.
But you may want to check out the pstools program pslist, also from Sysinternals. You can list the processes running on another machine. pslist is a command line tool, however.
Update:
BTW, you need to run in task-manager mode to get the CPU % e.g. pslist \\computername -s
EDIT:
Remote Process Explorer
Showing the parameters of running processes
(Process ID, Parent PID, CPU, Memory Usage, Priority, Handles, Threads and much more) in real time.
Killing the selected process at any moment, etc.
You can use taskkill.exe to kill a process on a remote Windows system. I don't think tasklist.exe is going to give you the output you want so you will need to use sysinternals pslist.exe as another commenter suggested. You can also use pskill.exe instead of taskkill.exe.