vba how to attach raster reference and set the level for that attachement

I having trouble in how to do this. Attaching the raster is no problem but there appears to be no setting for the level at the time of attachment. I'm using the below code to attach a raster.

Any one have any ideas to how to set the level (I know there a default that can be set in the preferences but I need to a different level and don't want to change the default)

Set oRast = oRastMan.Rasters.Attach(strTiffPath)


Is there a key-in that could achieve this? or after its attached is there an easy to change the level?

any ideas??

thanks
JD