PECOFF support and VMware

[Daniela]

Hi all!

I have some questions about the PECOFF_SUPPORT kernel option and vmware3:

When I include this option, can I run the PECOFF executables directly (given 
that the files needed by the program are there) without other programs?
Is there any reason for not doing so (especially security-related)?

When I open vmware-wizard and create a standard virtual machine with Micro$oft 
Windoze eXPensive Professional as a guest OS, it complains that this host 
doesn't have enough memory.
I can't understand this, as I have lots of memory.

Are there general security problems with VMware?
Could you recommend other emulators?

Any help would be greatly appreciated.

Daniela