XVesa Guest Additions

[psdp]

we use Tinycore Linux as the Guest OS with XVesa instead of Xorg. We are looking at adding host integration features.It looks like the guest additions require Xorg but we do not want to go for Xorg (due to size constraints). Out of the many features offered by Guest Additions, we are primarily looking at the seamless integration with the host feature (no need for users to press ctrl key) Is there any other way by which, we can provide such seamless experience?