I see warning message on the taskbar that "Windows - Virtual Memory Minimum Too Low". The operating system is Windows XP PRO. Is it possible to increase virtual memory for windows?

I recently upgraded my proc, HD, and RAM in my system at home. I went from 768MB RAM to 1.5GB. I reinstalled the OS (Win2K SP4) and went from 1024 (start) / 2048 (stop) for Virtual Memory to Windows ...