Understand that low resources are not a memory issue and are not typically corrected
by adding more RAM. Resources are (3) stacks (work areas) used to keep track of
the programs being run. If resources get low, first look to reduce the number of
programs activated.
Also, go the link below which gives some advice when you want to use more than 512mb
RAM
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q253912